using System;
using System.Collections;
using System.Collections.Generic;
using System.Collections.Specialized;
using System.Text;
using System.Text.RegularExpressions;
using System.Linq;

class Magatro
{
    static void Main()
    {
        long N = long.Parse(Console.ReadLine());
        List<int> a = new List<int>();
        if (N == 1)
        {
            Console.WriteLine("NO");
            return;
        }
       for(int i = 2; i <= Math.Sqrt(N); i++)
        {
            if (N % i == 0)
            {
                a.Add(0);
                while (N % i == 0)
                {
                    a[a.Count - 1]++;
                    N /= i;
                }
            }
        }
        if (N != 1)
        {
            a.Add(1);
        }

        if ((a.Count == 1&&a[0]<=2)||(a.Count==2&&a[0]==1&&a[1]==1))
        {
            Console.WriteLine("NO");
        }
        else
        {
            Console.WriteLine("YES");
        }
    }

}