import java.util.Scanner;
public class No36 {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		System.out.println(check(sc.nextLong())?"YES":"NO");
	}
	public static boolean check(Long n) {
		if (n == 1) return false;
		if (n % 2 == 0 || n <= 2) return true;
		for (int i = 3; i <= n / 2; i += 2)
			if (n % i == 0) return true;
		return false;
	}
}