#include <cstdio>
#include <cstdlib>
#include <cmath>
#include <climits>
#include <cfloat>
#include <map>
#include <utility>
#include <set>
#include <iostream>
#include <memory>
#include <string>
#include <vector>
#include <algorithm>
#include <functional>
#include <sstream>
#include <complex>
#include <stack>
#include <queue>
#include <iomanip>
using namespace std;
#define INF 1e9
#define PI acos(-1)
typedef long long ll;

bool is_prime(ll n) {
	for (int i = 2; i*i <= n; i++) {
		if (n%i == 0)return false;
	}
	return n != 1;
}

int main() {
	ll n;
	cin >> n;
	int cnt = 0;

	for (int i = 2; i<n; i++) {
		if (cnt >= 2)break;
		if (is_prime(i))if (n%i == 0) {
			if (n / i > 1) { cnt += 2; break; }
			if (n / i == 1)cnt++;
		}
	}

	cout << ((cnt >= 2) ? "YES" : "NO") << endl;
	

	return 0;
}