using System;

class HatePrime
{
	static public void Main(String[] args)
	{
		long N = long.Parse(Console.ReadLine());
		long sqn =(long)Math.Sqrt((double)N);
		for(long i=2; i<=sqn; i++)
		{
			if(N % i == 0)
			{
				if(!isPrime(i))
				{
					Console.WriteLine("YES");
					//Console.WriteLine("i=" + i);
					return;
				}
				else if(!isPrime(N/i))
				{
					Console.WriteLine("YES");
					//Console.WriteLine("N/i=" + (N/i));
					return;
				}
			}
		}
		Console.WriteLine("NO");
	}

	static bool isPrime(long n)
	{
		if(n == 2)
			return true;
		if(n < 2 || n % 2 == 0)
			return false;

		long i = 3;
		long sqn = (long)Math.Sqrt((double)n);
		while(i <= sqn) 
		{
			if(n % i == 0)
				return false;
			i += 2;
		}
		return true;
	}
}