#include<iostream>
#define ll long long

using namespace std;

bool is_prime(ll n){
    if(n == 1) return true;
    if(n == 2 || n == 3 || n == 5){
        return true;
    }
    
    if(n % 2 ==0 || n % 3 == 0 || n % 5 ==0){
        return false;
    }
    
    for(ll i=7;i <= n;i+=2){
        if(i == n) return true;
        else if(n % i == 0 && n != i) return false;
    }
}

int main(){
    ll n;
    cin >> n;
    if(is_prime(n)) cout << "NO" << endl;
    else cout << "YES" << endl;
    return 0;
}