#include <bits/stdc++.h>

using namespace std;

typedef pair<int,int> P;
typedef pair<int,pair<int,int>> PP;
typedef long long ll;

const double EPS = 1e-8;
const int INF = 1e9;
const int MOD = 1e9+7;

int dy[] = {0,1,0,-1};
int dx[] = {1,0,-1,0};

int main(void) {
	long long n;
	cin >> n;
	if(n == 1)cout << "NO" << endl;
	else{
		for(long long i=2;i*i<=n;i++){
			if(n%i == 0){
				cout << "YES" << endl;
				return 0;
			}
		}
		cout << "NO" << endl;
	}

	return 0;
}