#include <iostream>
#include <vector>
#include <cmath>

using namespace std;

int main()
{
  long long N;
  cin >> N;

  int count = 0;
  for(int i=2; i<=sqrt(N); ++i){
    while(N%i == 0){
      N /= i;
      ++count;
      if((count == 2 && N!=1) || (count == 3)){
        cout << "YES" << endl;
        return 0;
      }
    }
  }
  cout << "NO" << endl;
  return 0;
}