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;
		
		if(num==1){
			System.out.println("NO");
		}else{
			for(long i=2;i<num;i++){
				if(num%i==0){
					flag = true;
					break;
				}
			}
			System.out.println((flag)?"YES":"NO");
		}
	}
}