import java.util.Scanner;

public class No036{
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		long N = sc.nextLong();
		
		int p = 2;
		int num_prime_factor = 0;
		for(int i = 2; i < Math.sqrt(N); i++){
			if(N%p == 0){
				N /= p;
				num_prime_factor++;
			}
			else p++;
		}
		
		if(num_prime_factor >= 2) System.out.println("YES");
		else System.out.println("NO");
		
	}
}