#include<iostream>
#include<vector>
#include<algorithm>
using namespace std;
using ll = long long;

int main(void){
  ll n; cin >> n;
  int nn=1e7;
  vector<int> yakusu(nn+1, -1);
  for(int i=2; i<=nn; i++){
    if(yakusu[i]!=-1) continue;
    int copy=i;
    while(copy<=nn){
      if(yakusu[copy]==-1) yakusu[copy]=i;
      copy+=i;
    }
  } 
  for(int i=3; i<=min<ll>(n, nn); i++){
    if(yakusu[i]==i) continue;
    if(n%i==0){
      cout << "YES" << endl; return 0;
    }
  }
  cout << "NO" << endl;
  return 0; 
}