#include <bits/stdc++.h>
using namespace std;
using ll=long long;
using Graph=vector<vector<int>>;
#define MOD 998244353
#define INF 1000000000

int main(){
  ll N;
  cin>>N;
  bool flag=false;
  for(ll i=2;i*i<=N;i++){
    if(N%i==0){
      flag=true;
      break;
    }
  }

  if(flag){
    cout<<"YES"<<endl;
  }else{
    cout<<"NO"<<endl;
  }
}