#include <iostream>
#include <vector>
#include <algorithm>
#include <numeric>

bool is_prime(unsigned long long n)
{
	switch(n)
	{
		case 0:
		case 1: return true;
		case 2: 
		case 3: return true;
	}

	if(n % 2 == 0) return false;
    
	if(n % 3 == 0) return false;

	if(n % 6 != 1 && n % 6 != 5) return false;

	for(unsigned long long i = 5; i * i <= n; i += 6)
	{
		if(n % i == 0) return false;
		if(n % (i + 2) == 0) return false;
	}

	return true;
}

int main(void)
{
	unsigned long long N;
	
	std::cin >> N;	
	
	if(is_prime(N))
	{
		std::cout << "NO" << std::endl;
	}
	else
	{
		std::cout << "YES" << std::endl;
	}
	
	return 0;
}