diff --git a/ast/jvm/src/test/scala/jawn/ast/AstTestPlatform.scala b/ast/jvm/src/test/scala/jawn/ast/AstTestPlatform.scala
index a6eb18f0..5b42adb1 100644
--- a/ast/jvm/src/test/scala/jawn/ast/AstTestPlatform.scala
+++ b/ast/jvm/src/test/scala/jawn/ast/AstTestPlatform.scala
@@ -23,8 +23,11 @@ package org.typelevel.jawn
 package ast
 
 import org.scalacheck.Prop
+import Prop.{forAll, forAllNoShrink}
 
-import Prop.forAll
+import scala.util.Try
+
+import ArbitraryUtil.expNotationNums
 
 private[jawn] trait AstTestPlatform { self: AstTest =>
 
@@ -37,4 +40,10 @@ private[jawn] trait AstTestPlatform { self: AstTest =>
     )
   }
 
+  property(".asDouble") = forAllNoShrink { (expForm: (String, Double)) =>
+    Prop(
+      JParser.parseUnsafe(expForm._1).getDouble == Try(JParser.parseUnsafe(expForm._1).asDouble).toOption &&
+        JParser.parseUnsafe(expForm._1).asDouble == expForm._2
+    )
+  }
 }
diff --git a/ast/shared/src/main/scala/jawn/ast/JValue.scala b/ast/shared/src/main/scala/jawn/ast/JValue.scala
index 59c9afc3..2c20a838 100644
--- a/ast/shared/src/main/scala/jawn/ast/JValue.scala
+++ b/ast/shared/src/main/scala/jawn/ast/JValue.scala
@@ -254,13 +254,13 @@ case class DeferNum(s: String) extends JNum {
   lazy val n: Double = java.lang.Double.parseDouble(s)
 
   final override def getInt: Option[Int] = Some(n.toInt)
-  final override def getLong: Option[Long] = Some(util.parseLongUnsafe(s))
+  final override def getLong: Option[Long] = Some(n.toLong)
   final override def getDouble: Option[Double] = Some(n)
   final override def getBigInt: Option[BigInt] = Some(BigDecimal(s).toBigInt)
   final override def getBigDecimal: Option[BigDecimal] = Some(BigDecimal(s))
 
   final override def asInt: Int = n.toInt
-  final override def asLong: Long = util.parseLongUnsafe(s)
+  final override def asLong: Long = n.toLong
   final override def asDouble: Double = n
   final override def asBigInt: BigInt = BigDecimal(s).toBigInt
   final override def asBigDecimal: BigDecimal = BigDecimal(s)
diff --git a/ast/shared/src/test/scala/jawn/ArbitraryUtil.scala b/ast/shared/src/test/scala/jawn/ArbitraryUtil.scala
index 83280bcd..8c2e8876 100644
--- a/ast/shared/src/test/scala/jawn/ArbitraryUtil.scala
+++ b/ast/shared/src/test/scala/jawn/ArbitraryUtil.scala
@@ -62,4 +62,17 @@ object ArbitraryUtil {
 
   implicit lazy val arbitraryJValue: Arbitrary[JValue] =
     Arbitrary(jvalue())
+
+  // Valid JSON numbers with an exact double representation and in the Long range
+
+  implicit lazy val expNotationNums: Arbitrary[(String, Double)] = Arbitrary[(String, Double)] {
+    Gen.oneOf(
+      ("2e3", 2e3),
+      ("2.5e0", 2.5e0),
+      ("2e+3", 2e+3),
+      ("2.5e-1", 2.5e-1),
+      ("9.223372036854776e18", 9.223372036854776e18),
+      ("-9.223372036854776e+18", -9.223372036854776e18)
+    )
+  }
 }
diff --git a/ast/shared/src/test/scala/jawn/AstTest.scala b/ast/shared/src/test/scala/jawn/AstTest.scala
index e7adc509..a67ac3dc 100644
--- a/ast/shared/src/test/scala/jawn/AstTest.scala
+++ b/ast/shared/src/test/scala/jawn/AstTest.scala
@@ -23,10 +23,10 @@ package org.typelevel.jawn
 package ast
 
 import org.scalacheck.{Prop, Properties}
-import scala.util.{Success, Try}
 
+import scala.util.{Success, Try}
 import ArbitraryUtil._
-import Prop.forAll
+import Prop.{forAll, forAllNoShrink}
 
 class AstTest extends Properties("AstTest") with AstTestPlatform {
 
@@ -62,6 +62,13 @@ class AstTest extends Properties("AstTest") with AstTestPlatform {
     )
   }
 
+  property(".asInt") = forAllNoShrink { (expForm: (String, Double)) =>
+    Prop(
+      JParser.parseUnsafe(expForm._1).getInt == Try(JParser.parseUnsafe(expForm._1).asInt).toOption &&
+        JParser.parseUnsafe(expForm._1).asInt == expForm._2.intValue()
+    )
+  }
+
   property(".getLong") = forAll { (n: Long) =>
     Prop(
       JNum(n).getLong == Some(n) &&
@@ -69,6 +76,13 @@ class AstTest extends Properties("AstTest") with AstTestPlatform {
     )
   }
 
+  property(".asLong") = forAllNoShrink { (expForm: (String, Double)) =>
+    Prop(
+      JParser.parseUnsafe(expForm._1).getLong == Try(JParser.parseUnsafe(expForm._1).asLong).toOption &&
+        JParser.parseUnsafe(expForm._1).asLong == expForm._2.longValue()
+    )
+  }
+
   property(".getBigInt") = forAll { (n: BigInt) =>
     Prop(
       JNum(n.toString).getBigInt == Some(n) &&
@@ -76,6 +90,13 @@ class AstTest extends Properties("AstTest") with AstTestPlatform {
     )
   }
 
+  property(".asBigInt") = forAllNoShrink { (expForm: (String, Double)) =>
+    Prop(
+      JParser.parseUnsafe(expForm._1).getBigInt == Try(JParser.parseUnsafe(expForm._1).asBigInt).toOption &&
+        JParser.parseUnsafe(expForm._1).asBigInt == BigDecimal(expForm._2).toBigInt()
+    )
+  }
+
   property(".getBigDecimal") = forAll { (n: BigDecimal) =>
     if (Try(BigDecimal(n.toString)) == Success(n))
       Prop(
@@ -85,4 +106,11 @@ class AstTest extends Properties("AstTest") with AstTestPlatform {
     else
       Prop(true)
   }
+
+  property(".asBigDecimal") = forAllNoShrink { (expForm: (String, Double)) =>
+    Prop(
+      JParser.parseUnsafe(expForm._1).getBigDecimal == Try(JParser.parseUnsafe(expForm._1).asBigDecimal).toOption &&
+        JParser.parseUnsafe(expForm._1).asBigDecimal == BigDecimal(expForm._2)
+    )
+  }
 }