#include <bits/stdc++.h>
#define p(s) cout<<(s)<<endl
typedef long long ll;
using namespace std;

int main(){
	ll N;
	cin>>N;

	int ans = 0;
	for (ll i = 2; i * i <= N; i++){
		while (N%i == 0){
			N /= i;
			ans++;
		}
	}
	if(N>1) ans++;

	p(ans>2?"YES":"NO");
	return 0;
}