import java.util.*;

public class Main {
	static Scanner sc = new Scanner(System.in);
	public static void main(String[] args) {
		long n = sc.nextLong();
		System.out.println(PrimeFact(n)>=1?"YES":"NO");
	}
	
	static int PrimeFact (long n) {
		double sqrt = Math.sqrt(n);
		int total = 0;
		for (int i=2; i<=sqrt; i++) {
			boolean b = false;
			while (n%i==0) {
				n /= i;
				b = true;
			}
			if (b==true) {total++;}
		}
		return total;
	}
}