using System;

namespace No36_1{
    public class Program{
        public static void Main(string[] args){
            var input = long.Parse(Console.ReadLine());
            var tmp = input;
            var cnt = 0;

            for(long i = 2; i * i <= input; i++){
                while(tmp % i == 0){
                    tmp /= i;
                    cnt++;
                    if(cnt >= 2) {
                        if(!(i * i == input && cnt == 2)){
                            Console.WriteLine("YES");
                            return;
                        }
                    }
                }
            }
            Console.WriteLine("NO");
        }
    }
}