diff --git a/runtime/src/main/kotlin/kotlin/Boolean.kt b/runtime/src/main/kotlin/kotlin/Boolean.kt
index 7fef6073ba6..a315ba66ca7 100644
--- a/runtime/src/main/kotlin/kotlin/Boolean.kt
+++ b/runtime/src/main/kotlin/kotlin/Boolean.kt
@@ -21,6 +21,10 @@ package kotlin
  * represented as values of the primitive type `boolean`.
  */
 public final class Boolean private constructor(private val value: kotlin.native.internal.BooleanValue) : Comparable<Boolean> {
+
+    @SinceKotlin("1.3")
+    companion object {}
+
     /**
      * Returns the inverse of this boolean.
      */
diff --git a/runtime/src/main/kotlin/kotlin/Char.kt b/runtime/src/main/kotlin/kotlin/Char.kt
index 9edfde262ee..06095a60d65 100644
--- a/runtime/src/main/kotlin/kotlin/Char.kt
+++ b/runtime/src/main/kotlin/kotlin/Char.kt
@@ -76,6 +76,29 @@ public final class Char private constructor(private val value: kotlin.native.int
     external public fun toDouble(): Double
 
     companion object {
+        /**
+         * The minimum value of a character code unit.
+         */
+        @SinceKotlin("1.3")
+        public const val MIN_VALUE: Char = '\u0000'
+
+        /**
+         * The maximum value of a character code unit.
+         */
+        @SinceKotlin("1.3")
+        public const val MAX_VALUE: Char = '\uFFFF'
+
+        /**
+         * The number of bytes used to represent a Char in a binary form.
+         */
+        @SinceKotlin("1.3")
+        public const val SIZE_BYTES: Int = 2
+        /**
+         * The number of bits used to represent a Char in a binary form.
+         */
+        @SinceKotlin("1.3")
+        public const val SIZE_BITS: Int = 16
+
         /**
          * The minimum value of a Unicode high-surrogate code unit.
          */
diff --git a/runtime/src/main/kotlin/kotlin/Primitives.kt b/runtime/src/main/kotlin/kotlin/Primitives.kt
index a03aaab0da4..0fadb25c5a5 100644
--- a/runtime/src/main/kotlin/kotlin/Primitives.kt
+++ b/runtime/src/main/kotlin/kotlin/Primitives.kt
@@ -33,6 +33,18 @@ public final class Byte private constructor(private val value: kotlin.native.int
          * A constant holding the maximum value an instance of Byte can have.
          */
         public const val MAX_VALUE: Byte = 127
+
+        /**
+         * The number of bytes used to represent an instance of Byte in a binary form.
+         */
+        @SinceKotlin("1.3")
+        public const val SIZE_BYTES: Int = 1
+
+        /**
+         * The number of bits used to represent an instance of Byte in a binary form.
+         */
+        @SinceKotlin("1.3")
+        public const val SIZE_BITS: Int = 8
     }
 
     /**
@@ -247,6 +259,18 @@ public final class Short private constructor(private val value: kotlin.native.in
          * A constant holding the maximum value an instance of Short can have.
          */
         public const val MAX_VALUE: Short = 32767
+
+        /**
+         * The number of bytes used to represent an instance of Short in a binary form.
+         */
+        @SinceKotlin("1.3")
+        public const val SIZE_BYTES: Int = 2
+
+        /**
+         * The number of bits used to represent an instance of Short in a binary form.
+         */
+        @SinceKotlin("1.3")
+        public const val SIZE_BITS: Int = 16
     }
 
     /**
@@ -461,6 +485,18 @@ public final class Int private constructor(private val value: kotlin.native.inte
          * A constant holding the maximum value an instance of Int can have.
          */
         public const val MAX_VALUE: Int = 2147483647
+
+        /**
+         * The number of bytes used to represent an instance of Int in a binary form.
+         */
+        @SinceKotlin("1.3")
+        public const val SIZE_BYTES: Int = 4
+
+        /**
+         * The number of bits used to represent an instance of Int in a binary form.
+         */
+        @SinceKotlin("1.3")
+        public const val SIZE_BITS: Int = 32
     }
 
     /**
@@ -697,6 +733,18 @@ public final class Long private constructor(private val value: kotlin.native.int
          * A constant holding the maximum value an instance of Long can have.
          */
         public const val MAX_VALUE: Long = 9223372036854775807L
+
+        /**
+         * The number of bytes used to represent an instance of Long in a binary form.
+         */
+        @SinceKotlin("1.3")
+        public const val SIZE_BYTES: Int = 8
+
+        /**
+         * The number of bits used to represent an instance of Long in a binary form.
+         */
+        @SinceKotlin("1.3")
+        public const val SIZE_BITS: Int = 64
     }
 
     /**