using System;
using System.Collections;
using System.Collections.Generic;
using System.Diagnostics;
using System.IO;
using System.Linq;
using System.Numerics;
using System.Text;
using System.Text.RegularExpressions;
using System.Threading.Tasks;
using static System.Math;
public static class P
{
    public static void Main()
    {
        var n = long.Parse(Console.ReadLine());
        for (long i = 2; i * i <= n; i++)
        {
            if (n % i == 0) { Console.WriteLine("YES"); return; }
        }
        Console.WriteLine("NO");
    }
}