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

int Count( const long long N )
{
long long i;
long long X;
int iCnt;

	X = N;

	iCnt = 0;
	while( X > 0 && X % 2 == 0 )
	{
		iCnt++;
		X /= 2;
	}

	for( i = 3; i * i <= X; i += 2 )
	{
		while( X > 0 && X % i == 0 )
		{
			iCnt++;
			X /= i;
		}
	}

	if( X > 1 ) iCnt++;

	return iCnt;
}

int main()
{
long long N;

	cin >> N;

	if( Count( N ) > 2 )
		cout << "YES" << endl;
	else
		cout << "NO" << endl;

	return 0;
}