#include <bits/stdc++.h>
using namespace std;
typedef long long ll;

int main() {
	ll n;
	cin >> n;
	int count = 0;
	vector<bool> p(n);
	for (ll i = 0;i < n;i++) {
		p[i] = false;
	}
	ll i = 2;
	while(i<n) {
		if (!p[i]) {
			for (ll j = 1;i*j < n;j++) {
				p[i*j] = true;
			}
			while (n%i == 0&&i<n) {
				n /= i;
				count++;
				if (count == 2) {
					cout << "YES" << endl;
					return 0;
				}
			}
		}
		i++;
	}
	cout << "NO" << endl;



	return 0;
}