Java program to check entered number is prime palindrome or not

Write a java program to enter any integer number and check number is Prime Palindrome or Not.

import java.util.*;
class PrimePalindrome
{
  public static void main(String arr[])
  {
      Scanner sc=new Scanner(System.in);
      int num,a,digit,rev=0;
      boolean flag;
      System.out.println("Enter any Number :");
      num=sc.nextInt(); 
      a=num;
      while(a>0)
      {
          digit=a%10;
          rev=rev*10+digit;
          a=a/10;
      }
      if(num==rev)
      {
          flag=true;
          for(a=2;a<num;a++)
          {
              if(num%a==0)
              {
                  flag=false;
                  break;
              }
          }
          if(flag==true&&num>1)
          {
              System.out.println("Number is Palindrome Prime"); 
          }
          else
          {
              System.out.println("Number is Palindrome but not Prime"); 
          }
          
      }
      else
      {
          System.out.println("Number id not palindrome");
      }
  }
}

Enter any Number :

979

Number is Palindrome but not Prime

Enter any Number :

797

Number is Palindrome Prime