#include<iostream>
using namespace std;
int pp(long long n,int count){
    for(int i=2;i*i<=n;i++){
        if(n%i == 0){
            while(n%i == 0){
                count++;
                n /= i;
            }
            return pp(n,count);
        }
    }
    return count;
}
int main(){
    long long N;
    cin >> N;
    if(pp(N,1) <= 2) cout << "NO" << endl;
    else cout << "YES" << endl;
    return 0;
}