using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Strong_number
{
    class Program
    {
        static void Main(string[] args)
        {
            string number = Console.ReadLine();
            int factoriel = 1;
            int result = 0;

            for (int i = 0; i < number.Length; i++)
            {
                int singleDigit = int.Parse(number[i].ToString());
                for (int j = 1; j <= singleDigit; j++)
                {
                    factoriel *= j;
                }
                result += factoriel;
                factoriel = 1;
            }

            if (result==int.Parse(number))
            {
                Console.WriteLine("yes");
            }
            else
            {
                Console.WriteLine("no");
            }
        }
    }
}