using System;

namespace _01ExerciseStrongNumber
{
    class Program
    {
        static void Main(string[] args)
        {
            int number = int.Parse(Console.ReadLine());
            int copy = number;

            int currentNumber = 0;
            int factSum = 0;

            while (copy != 0)
            {
                currentNumber = copy % 10;
                copy = copy / 10;

                int fact = 1;

                for (int i = 1; i <= currentNumber; i++)
                {
                    fact = fact * i;
                }
                factSum = factSum + fact;
            }
            if (number == factSum)
            {
                Console.WriteLine("yes");
            }
            else
            {
                Console.WriteLine("no");
            }
        }
    }
}