import java.io.*; import java.util.*; public class Main { public static void main(String[] args) throws Exception { Scanner sc = new Scanner(); if (canUse(sc.nextLong())) { System.out.println("YES"); } else { System.out.println("NO"); } } static boolean canUse(long x) { for (int i = 2; i <= Math.sqrt(x); i++) { if (x % i == 0) { if (!isPrime(i) || !isPrime(x / i)) { return true; } } } return false; } static boolean isPrime(long x) { for (int i = 2; i <= Math.sqrt(x); i++) { if (x % i == 0) { return false; } } return true; } } class Scanner { BufferedReader br = new BufferedReader(new InputStreamReader(System.in)); StringTokenizer st = new StringTokenizer(""); public Scanner() throws Exception { } public int nextInt() throws Exception { return Integer.parseInt(next()); } public long nextLong() throws Exception { return Long.parseLong(next()); } public double nextDouble() throws Exception { return Double.parseDouble(next()); } public String next() throws Exception { while (!st.hasMoreTokens()) { st = new StringTokenizer(br.readLine()); } return st.nextToken(); } }