import java.util.*;
import java.io.*;

public class Main {
    public static void main(String[] args) throws Exception {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        long n = Long.parseLong(br.readLine());
        long x = n;
        int count = 0;
        for (long i = 2; i <= Math.sqrt(x) && count < 2; i++) {
            while(x % i == 0) {
                count++;
                x /= i;
            }
        }
        if (x != 1 && x != n) {
            count++;
        }
        if (count >= 2) {
            System.out.println("YES");
        } else {
            System.out.println("NO");
        }
    }
}