using System;

namespace strong_number
{
    class Program
    {
      //  Write a program to check if a given number is a strong number or not.A number is
      // strong if the sum of the Factorial of each digit is equal to the number.For
     //  example 145 is a strong number, because 1! + 4! + 5! = 145. Print "yes" if
     //    the number is strong and “no” if the number is not strong.
        static void Main()
        {
            string Num = Console.ReadLine();
            long strongNum = long.Parse(Num);
            //-----------------------
            string answer = "no";
            //-----------------------
            foreach (char i in Num)
            {
                long Digit = long.Parse(i.ToString());
                Digit = factorial_Recursion(Digit);
                if (Digit == strongNum) { answer = "yes"; } else { answer = "no"; }
            }
            //-----------------------
            Console.WriteLine(answer);
        }
        public static long factorial_Recursion(long number)
        {
           int fact =1;
            for (int i = 1; i <= number; i++)
            {
                  fact *= i;
            }
            return fact;
        }
    }
}