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

int main() {
    int N;
    cin >> N;
    int cnt = 0;
    for (int i = 2; i * i <= N; i++) {
        if (N % i == 0) {
            while (N % i == 0) {
                N /= i;
                cnt++;
            }
        }
    }
    if (N != 1) cnt++;
    cout << (cnt >= 2 ? "YES" : "NO") << endl;
}