Strange: Write a C program to Check Strange number or Not

Check Strange number or Not 

#include<stdio.h>
int main()
{
    int a,b,n,j,temp=0;
    printf("Enter the number:");
    scanf("%d",&a);
    temp=a;
    while(temp>0)
    {
        j=temp%10;
        n=1;
        for(b=2;b<=j/2;b++)
        {
            if(j%b==0)
            {
                n=0;
                break;
            }
        }
        temp=temp/10;
    }
    if(n==1)
        printf("YES! %d is a Strange number ",a);
    else
    printf("No! %d is Not a strange number ",a);
}