#include<bits/stdc++.h>
using namespace std;
int main(){
    int n;
    cin>>n;
    for(int i=2;i*i<=n;i++){
        if(n%i==0){
            cout<<i<<endl;
            return 0;
        }
    }
    cout<<"Yes"<<endl;
    return 0;
}
/**************************************************************
	Problem: 1061
	User: fuhoubin
	Language: C++
	Result: Accepted
	Time:15 ms
	Memory:2072 kb
****************************************************************/