using System.Linq;
using System.Collections.Generic;
using static System.Math;
using System;

public class Hello
{
    static void Main()
    {
        var n = long.Parse(Console.ReadLine().Trim());
        if (n <= 5) { Console.WriteLine("NO"); goto exit; }
        var a = GeneratePrime((int)Sqrt(n));
        getAns(n, a);
    exit:;
    }
    static void getAns(long n, List<int> a)
    {
        var count = 0;
        foreach (var x in a)
        {
            while (true)
            {
                if (n % x == 0)
                {
                    count++;
                    n /= x;
                    if (n == 1) { Console.WriteLine("NO"); return; }
                    if (count >= 2) { Console.WriteLine("YES"); return; }
                }
                else break;
            }
        }
        Console.WriteLine("NO");
    }
    static List<int> GeneratePrime(int m)
    {
        var a = new List<int>();
        int p;
        var sqrtMax = Math.Sqrt(m);
        var s = Enumerable.Range(2, m - 1).ToList();
        do
        {
            p = s.First();
            a.Add(p);
            s.RemoveAll(n => n % p == 0);
        }
        while (p < sqrtMax);
        a.AddRange(s);
        return a;
    }
}