using System;

class Program
{
    public static void Main(string[] args)
    {
        long n = long.Parse(Console.ReadLine());
        long upper = (long)Math.Min(Math.Sqrt(n) + 1, n - 1);
        bool[] used = new bool[upper];
        bool[] prime = new bool[upper];
        if (upper >= 3)
        {
            used[2] = true;
            prime[2] = true;
        }
        if (upper >= 4)
        {
            used[3] = true;
            prime[3] = true;
        }
        for (long i = 2; i <= Math.Sqrt(n); i++)
        {            
            if (n % i == 0)
            {
                if (!used[i])
                {
                    used[i] = true;
                    long d = (long)Math.Min(Math.Sqrt(n) + 1, n - 1);
                    bool isPrime = true;
                    for (long k = 2; k <= d; k++)
                    {
                        if (i%k == 0)
                        {
                            isPrime = false;
                            break;
                        }
                    }
                    prime[i] = isPrime;
                }
                if (!prime[i])
                {
                    Console.WriteLine("YES");
                    return;
                }
            }
        }
        Console.WriteLine("NO");        
    }
}