import java.util.*;
public class HatePrenum1 {
	public static void main(String[] args){
		Scanner scan=new Scanner(System.in);
		long num=scan.nextLong();
		boolean flag = false;
		for(long i=2;i<num;i++){
			if(num%i==0){
				flag = true;
				break;
			}
		}
		System.out.println((flag)?"YES":"NO");
	}
}