import java.util.*;

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