import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.TreeSet;

public class No36 {
	
	static TreeSet<Integer> ts = new TreeSet<>();

	public static void main(String[] args) throws IOException{
		//素数が嫌い！
		long N = Long.parseLong(readStr()[0]);
		
		wari(N);
		
		System.out.println(ts.size() > 1 ? "YES" : "NO");

	}
	
	public static void wari(long a) {
		int sq = (int)Math.sqrt(a);
		for(int i = 2;i <= sq;i++) {
			if(a % i == 0) {
				ts.add(i);
				ts.add((int)(a / i));
				wari(a / i);
				break;
			}
		}
	}
	
	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;

	}

}