using System;

class No36
{
    static void Main()
    {
        var num = Int64.Parse(Console.ReadLine());
        if (IsPrimeNumber(num))
        {
            Console.WriteLine("NO");
            return;
        }
        var ans = "NO";
        var s = Math.Sqrt(num) + 1;
        for (long i = 2; i < s; i++)
        {
            if (num % i == 0) { 
                if (!IsPrimeNumber(i))
                {
                    ans = "YES";
                    break;
                }
            }
        }
        Console.WriteLine(ans);
    }
    static bool IsPrimeNumber(long num)
    {
        if (num == 1 || num == 2) return true;
        var s = Math.Sqrt(num) + 1;
        for (long i = 2; i < s; i++) if (num % i == 0) return false;
        return true;
    }
}