#include <bits/stdc++.h>

using namespace std;
using ll = long long;
using ull = unsigned long long;

#ifndef __MACRO_H__
#define __MACRO_H__

#define all(collection)  (collection).begin(), (collection).end()		// begin to end
#define rep(i, begin, end) for (ll i = begin; i < end; i++)				// repeat
#define repr(i, begin, end) for (ll i = begin; end < i; i--)			// repeat reverse

#endif

bool IsPrime(int num)
{
	if (num < 2) return false;
	else if (num == 2) return true;
	else if (num % 2 == 0) return false; // 偶数はあらかじめ除く

	double sqrtNum = sqrt(num);
	for (int i = 3; i <= sqrtNum; i += 2)
	{
		if (num % i == 0)
		{
			// 素数ではない
			return false;
		}
	}

	// 素数である
	return true;
}

int main(void)
{
	ll n; cin >> n;

	if (n == 1)
	{
		cout << "NO" << endl;
		return 0;
	}

	ll lc = (ll)sqrt(n) + 1;
	rep(i, 2, lc)
	{
		if (n % i == 0)
		{
			if (!IsPrime(n / i))
			{
				cout << "YES" << endl;
				return 0;
			}
		}
	}

	cout << "NO" << endl;
	return 0;
}