#include <iostream>
#include <vector>
#include <cmath>

int main() {
	std::ios::sync_with_stdio(false);
	std::cin.tie(0);

	long long int n;
	bool already_devided = false;

	std::cin >> n;
	int sqrt_n = std::sqrt(n);
	for (int i = 2; i < sqrt_n; ++i) {
		if (n%i == 0) {
			if (already_devided) {
				std::cout << "YES\n";
				return 0;
			}
			else {
				already_devided = true;
				n /= i;
				i = 1;
			}
		}
	}

	std::cout << "NO\n";

	return 0;
}