import java.util.*;
import java.math.*;
import java.io.*;
 
public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		long n = sc.nextLong();
		long nn = n;
		ArrayList<Integer> list = new ArrayList<Integer>();
		long tmp = (long)Math.sqrt(n);
		for(int i = 2; i <= tmp; i++) {
			while(n % i == 0) {
				list.add(i);
				n /= i;
			}
		}
		if(list.size() > 2 || list.size() >= 1 && tmp*tmp != nn) System.out.println("YES");
		else System.out.println("NO");
	}
}