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

int main()
{
	int64_t n;
	cin >> n;
	
	if(n == 1)
	{
		cout << "NO" << endl;
		return 0;
	}
	
	for(int64_t i = 2; i * i <= n; i++)
	{
		if(n % i == 0)
		{
			cout << "YES" << endl;
			return 0;
		}
	}
	cout << "NO" << endl;
	return 0;
}