import java.io.BufferedReader;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.BitSet;
import java.util.Comparator;
import java.util.List;
import java.util.TreeSet;
public class Main {
	public static int w;
	public static int k;
	public static int n;
//	public static int[][] dp;
	public static int[] a;
	public static int[] b;
	public static List<double[]> list = new ArrayList<double[]>();
	public static TreeSet<Integer> set = new TreeSet<Integer>();
//	public static PriorityQueue<Integer> pq = new PriorityQueue<Integer>();
	public static void main(String[] args) throws NumberFormatException, IOException{

		ContestScanner in = new ContestScanner();
		long n = in.nextLong();
		int[] p = new int[10000];
		int i=1;
		int count = 2;
		p[0] = 2;
		while(i<10000){
			count++;
			boolean notp = false;
			for(int j=0; j<i; j++){
				if(count%p[j] == 0){
					notp = true;
					break;
				}
			}
			if(!notp){
				p[i++] = count;
			}
		}
//		i=0;
		count = 0;
		for(int j=0; j<n; j++){
			if(n % p[j] == 0){
				count++;
				if(n % (p[j]*p[j]) == 0) count++;
			}
			if(count > 1){
				System.out.println("YES");
				return;
			}
		}
//		while(i<10000){
//			if(p[i] == count) i++;
//			else{
//				if(n%count == 0){
//					System.out.println("YES");
//					return;
//				}
//			}
//			count++;
//			if(count == n) break;
//		}
		System.out.println("NO");
	}
	
}



class Node{
	int id;
	List<Node> edge = new ArrayList<Node>();
	public Node(int id){
		this.id = id;
	}
	public void createEdge(Node node){
		edge.add(node);
	}
}

class MyMath{
	public static long fact(long n){
		long res = 1;
		while(n > 0){
			res *= n--;
		}
		return res;
	}
	public static long[][] pascalT(int n){
		long[][] tri = new long[n][];
		for(int i=0; i<n; i++){
			tri[i] = new long[i+1];
			for(int j=0; j<i+1; j++){
				if(j == 0 || j == i){
					tri[i][j] = 1;
				}else{
					tri[i][j] = tri[i-1][j-1] + tri[i-1][j];
				}
			}
		}
		return tri;
	}
}

class MyComp implements Comparator<Integer>{
	public int compare(Integer arg0, Integer arg1) {
		return arg0 - arg1;
	}
}
//
//class MyCompB implements Comparator<int[]>{
//	public int compare(int[] arg0, int[] arg1) {
//		return arg0[1] - arg1[1];
//	}
//}

class ContestScanner{
	private BufferedReader reader;
	private String[] line;
	private int idx;
	public ContestScanner() throws FileNotFoundException{
		reader = new BufferedReader(new InputStreamReader(System.in));
	}
	
	public String nextToken() throws IOException{
		if(line == null || line.length <= idx){
			line = reader.readLine().trim().split(" ");
			idx = 0;
		}
		return line[idx++];
	}
	
	public long nextLong() throws IOException, NumberFormatException{
		return Long.parseLong(nextToken());
	}
	
	public int nextInt() throws NumberFormatException, IOException{
		return (int)nextLong();
	}
	
	public double nextDouble() throws NumberFormatException, IOException{
		return Double.parseDouble(nextToken());
	}
}