#include <iostream>
#include <vector>
#include <string>
#include <algorithm>
#include <cmath>
#include <map>
#include <stack>
#include <queue>
#include <cstdlib>
#include <numeric>


/*
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*/

long long pow(long long a, long long b)
{
	long long ans = 1;
	for (long long i = 0; i < b; i++) {
		ans *= a;
	}
	return ans;
}


int main()
{
	long long n;

	std::cin >> n;

	std::vector<long long> num;
	for (long long i = 2; i * i <= n; i++) {
		if (i * i == n) {
			num.push_back(i);
		} else if (n % i == 0) {
			num.push_back(i);
			num.push_back(n / i);
		}
	}

	if (n == 1 || num.size() == 0) {
		std::cout << "NO" << std::endl;
		return 0;
	}

	for (long long i : num) {
		for (long long j = 2; j * j <= i; j++) {
			if (i % j == 0) {
				std::cout << "YES" << std::endl;
				return 0;
			}
		}
	}

	std::cout << "NO" << std::endl;

	return 0;
}