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

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