#include<iostream>
#include<vector>

using namespace std;

#define MAX 10000000
bool zaru[MAX+1];
vector<long long> pr;

int main(){

  long long N;
  long long fN;

  cin>>N;

  fN=N;
  for(int i=2;i*i<=N;i++) zaru[i]=true;

  for(int i=2;i*i<=N;i++){
    if(zaru[i]){
      pr.push_back(i);
      for(int j=i*2;j*j<=N;j+=i) zaru[i]=false;
    }
  }

  for(int i=0;i<pr.size();i++){
    if(N%pr[i]==0){
      N/=pr[i];
      break;
    }
  }

  if(N!=1&&N!=fN) cout<<"YES"<<endl;
  else cout<<"NO"<<endl;
}