#include <bits/stdc++.h>
using namespace std;
int main(){
  long long N;
  cin >> N;
  int cnt = 0;
  for (long long i = 2; i * i <= N; i++){
    if (N % i == 0){
      cnt++;
      while (N % i == 0){
        N /= i;
      }
    }
  }
  if (N > 1){
    cnt++;
  }
  if (cnt <= 2){
    cout << "Yes" << endl;
  } else {
    cout << "No" << endl;
  }
}