#include <iostream>
#include <algorithm>
#include <cstdio>
#include <string>
#include <cmath>

#define ll long long

using namespace std;

int main(){

   ll n;
   cin>>n;
   
   int cnt=0;
   ll t=2;
   while(true){
     if(n%t==0){
         n/=t;
         t=2;
         cnt++;
     }else{
         t++;
     }
      if(t>sqrt(n)) break;
   }

   if(cnt>=2) cout<<"YES"<<endl;
   else cout<<"NO"<<endl;
   
   return 0;
}