#include<bits/stdc++.h>
using namespace std;

typedef long long ll;

int main(){
    ll N; cin >> N;
    int ans=0;
    for(int i=2;i*i<N;i++){
        while(N%i==0){
            N/i;
            ans++;
            if(ans>2){
                cout << "YES" << endl;
                return 0;
            }
        }
    }
    cout << "NO" << endl;
}