import java.math.*;
import java.util.*;


public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		long n=sc.nextLong();
		if(n==1){
			System.out.println("NO");
			return;
		}
		int count=0;
		for(int i=2;i*i<=n;i++){
			if(n%i==0){
				count++;
			}
		}
		if(count>2){
			System.out.println("YES");
		}else
		System.out.println("NO");
	}
}