using System;
using System.Collections.Generic;
using System.Linq;
public class Program{
    public static void Main(){
        var n = long.Parse(Console.ReadLine());
        var N = (long)Math.Truncate(Math.Sqrt(n));
        var k = Prime(N);
        var a = new List<long>();
        for(var i=0;i<k.Count;i++){
            if(n%k[i]==0){
                while(n%k[i]==0){
                    n /= k[i];
                }
                a.Add(k[i]);
            }
            if(n==1){
                break;
            }
        }
        a.Add(n);
        if(a.Count<=2){
            Console.WriteLine("Yes");
        }
        else{
            Console.WriteLine("No");
        }
        
    }
    static List<int> Prime(long n)
    {
        var isPrime = new bool[n+1];
        var k = new List<int>();
        for (int i = 2; i <= n; i++)
        {
            isPrime[i] = true;
        }
    
        for (int i = 2; i * i <= n; i++)
        {
            if (isPrime[i])
            {
                for (int j = i * i; j <= n; j += i)
                {
                    isPrime[j] = false;
                }
            }
        }
    
        for (int i = 2; i <= n; i++)
        {
            if (isPrime[i])
            {
                k.Add(i);
            }
        }
        return k;
    }
}