#include <bits/stdc++.h>
using namespace std;
using ll = long long;

int main(){
    ll N;
    cin >> N;
    vector<ll> P;
    for (ll p = 2; p*p <= N; p++){
        while (N%p == 0){
            P.push_back(p);
            N /= p;
        }
    }
    if (N != 1) P.push_back(N);

    cout << (P.size() > 2? "YES": "NO") << endl;
}