#include <iostream>
#include <vector>
using namespace std;
typedef long long ll;
int main(){
  ll N;cin>>N;
  string ans="NO";
  ll cnt=0;
  ll N2=N;
  for(ll i=2;i*i<N;++i){
    if(cnt>1){
      ans="YES";
      break;
    }
    if(N2==1) break;
    if(N2%i==0){
      while(1){
        if(N2%i!=0) break;
        N2/=i;
        cnt+=1;
      }
    }
  }
  cout<<ans<<endl;
  return 0;
}