import java.util.Scanner;

public class StrongNumberP_06 {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);

        String input=scanner.nextLine();
        int sum=0;

        for (int i = 0; i <input.length() ; i++) {
            int digit= Integer.parseInt(input.charAt(i)+"");
            int fact=1;

            for (int j = 1; j <= digit; j++) {
                fact=fact*j;

            }sum=sum+fact;

        }
        if(sum==Integer.parseInt(input)){
            System.out.println("yes");
        }else {
            System.out.println("no");
        }

    }
}