import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.ArrayList;
public class No36_2 {
	
	static int res = 0;

	public static void main(String[] args) throws IOException{
		//素数が嫌い！
		long N = Long.parseLong(readStr()[0]);
		
		while(N % 2 == 0) {
			res++;
			N /= 2;
		}

		long i = 3l;
		
		if(res == 2 && N > 1) {
			res++;
		}else if(res < 3){
			
			while(i <= N) {
				if(N % i == 0) {
					res++;
					N /= i;
					if(i < N) res++;
				}else {
					i += 2;
					if(i != N && i >= (long)Math.sqrt(N)) break;
				}
			}
		}
		
		System.out.println(res > 2 ? "YES" : "NO");

	}
	

	
	public static String[] readStr() throws IOException{
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		ArrayList<String> list = new ArrayList<>();

		do {
			list.add(br.readLine());
		}while(br.ready());

		br.close();

		String[] text = new String[list.size()];
		list.toArray(text);

		return text;

	}

}