using static System.Math;
using System;

public class Hello
{
    static void Main()
    {
        var n = long.Parse(Console.ReadLine().Trim());
        if (n == 1) Console.WriteLine("NO");
        else getAns(n);

    }
    static void getAns(long n)
    {
        for (int i = 2; i * i <= n; i++)
        {
            if (n % i == 0)
            {
                if (!IsPrime(i)) { Console.WriteLine("YES"); return; }
                if (!IsPrime((int)(n / i))) { Console.WriteLine("YES"); return; }
            }
        }
        Console.WriteLine("NO");
    }
    static bool IsPrime(int n)
    {
        if (n < 2) return false;
        else if (n == 2) return true;
        else if (n % 2 == 0) return false;
        double sqrtNum = Sqrt(n);
        for (int i = 3; i <= sqrtNum; i += 2)
            if (n % i == 0) return false;
        return true;
    }
}