#include<bits/stdc++.h>
using namespace std;
int main(){
    int n,f=1,d=0;
    cin>>n;
    for(int i=2;i<=n-1;i++){
    	if(n%i==0) {
    	 f=0;
		 d=i;
		 break;	
    	}
    }
    if(f==0) cout<<d;
    else cout<<"Yes";
	return 0;
}

/**************************************************************
	Problem: 1061
	User: duyahan
	Language: C++
	Result: Accepted
	Time:8 ms
	Memory:2072 kb
****************************************************************/