using System;

class Program
{
    public static void Main(string[] args)
    {
        long n = long.Parse(Console.ReadLine());
        double max = Math.Sqrt(n);
        for (long i = 2; i <= max + 1; i++)
        {
            if (n % i == 0)
            {
                Console.WriteLine("YES");
                return;
            }
        }
        Console.WriteLine("NO");        
    }
}