#include<iostream>
#define ll long long

using namespace std;

ll is_prime(ll n){
    ll ans = 0;
    for(ll i=2;i*i <= n;i++){
        while(n % i == 0){
            ans++;
            n /= i;
        }
    }
    if(n != 1) ans++;
    return ans;
}

int main(){
    ll n;
    cin >> n;
    if(is_prime(n) < 3) cout << "NO" << endl;
    else cout << "YES" << endl;
    return 0;
}