using System;

namespace _06._Strong_number
{
    class Program
    {
        static void Main(string[] args)
        {
            string num = Console.ReadLine();
            int sum = 0;
            for (int i = 0; i < num.Length; i++)
            {
                int currentNum = (int)char.GetNumericValue(num[i]);
                int factorial = currentNum;
                for (int j = currentNum - 1; j >= 1; j--)
                {
                    factorial = factorial * j;
                }
                sum += factorial;
            }
            string checkSum;
            checkSum = sum.ToString();
            if (checkSum == num)
            {
                Console.WriteLine("yes");
            }
            else
            {
                Console.WriteLine("no");
            }
        }
    }
}