#include <bits/stdc++.h>

using namespace std;

#define LL long long

int main() {
    LL n, nn;
    cin >> n;
    nn = n;
    int count = 0;
    for (LL i = 2; i * i <= nn; i++) {
        while (n % i == 0) {
            n /= i;
            count++;
            if (count == 2 && n != 1) {
                cout << "YES" << endl;
                return 0;
            }
        }
    }
    cout << "NO" << endl;
    return 0;
}