import java.util.*;

public class Main {

  public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    long n = sc.nextLong();
    long p = 0;
    long s = 0;
    long t = 0;
    for(long i = 2; (i * i) <= n; i++) {
      if((n % i) == 0) {
        p += 2;
        s = i;
        t = n / i;
        break;
      }
    }
    for(long i = 2; (i * i) <= s; i++) {
      if((s % i) == 0) {
        p += 2;
        break;
      }
    }
    for(long i = 2; (i * i) <= t; i++) {
      if((t % i) == 0) {
        p += 2;
        break;
      }
    }
    String ans = "NO";
    if(p >= 3) ans = "YES";
    System.out.println(ans);
  }
}