#include <algorithm>
#include <iostream>
#include <vector>
#include <set>
#include <string.h>
#include <math.h>
 
using namespace std;

vector<long long> p_decom(long long m){
  vector<long long> v;

  while(m % 2 == 0){
    v.push_back(2);
    m /= 2;
  }

  for(long long i = 3; i * i <= m; i += 2){
    while(m % i == 0){
      v.push_back(i);
      m /= i;
    }
  }

  if(m > 1){
    v.push_back(m);
  }

  return v;
}
 
int main(){
  long long n;
  cin>>n;
  if(n==1){
    cout << "NO" << endl;
    return 0;
  }
  vector<long long> v = p_decom(n);
  set<long long> se(v.begin(),v.end());
  if(v.size() <= 1){
    cout << "NO" << endl;
    return 0;
  }
  cout << "YES" << endl;
  return 0;
}