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

auto main() -> int {
  long n;
  cin >> n;
  int c = 0;
  for (long i = 2; i * i <= n; i++) {
    if (n % i) {
      continue;
    }
    c++;
    while (n % i == 0) {
      n /= i;
    }
  }
  if (n > 1) {
    c++;
  }
  cout << (c <= 2 ? "Yes" : "No") << '\n';
}