# Java Program to Check if the given number is Emirp Number or not1 min read

In this tutorial of Emirp Number in Java, we will write a program to check for the Emirp number in Java. Let us start by understanding, what is Emirp number.

## Emirp Number

A number is said to be an Emirp number if it is a prime number and when reversed, the result formed is also a Prime Number. Emirp is backward for Prime, which indicates that a number, when formed backward, is also a prime number. Hence also known as twisted prime numbers.

Example: 13, 79, 199, 107 etc.

Explanation: Consider a Prime Number, 13
The reverse of 13: 31, which is also a prime number. Therefore, 13 is an Emirp Number.

## Java Program to check for Emirp Number Using Function.

Output:

`//First Run Enter a number: 13 13 is an Emirp number. //Second Run Enter a number: 107 107 is an Emirp number. //Third Run Enter a number: 23 23 is not an Emirp number.`

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