#include<iostream>
using namespace std;
int main(){
    int n,i=0;
    cin>>n;
    for(i=2;i<n;i++){
        if(n%i==0){
            cout<<i;
            return 0;
        }
    }
    cout<<"Yes";
}
/**************************************************************
	Problem: 1061
	User: yangjunwen
	Language: C++
	Result: Accepted
	Time:6 ms
	Memory:2072 kb
****************************************************************/