package main

import (
	"fmt"
)

func primeFactor(n int) []int {
	res := make([]int, 0)
	for i := 2; i*i < n; i++ {
		for true {
			if n%i != 0 {
				break
			}
			res = append(res, i)
			n /= i
		}
	}
	//if n != 1 {
	//	res[n] = 1
	//}
	return res
}

func main() {
	var N int
	fmt.Scan(&N)
	x := primeFactor(N)
	//fmt.Println(x)
	if len(x) > 1 {
		fmt.Println("YES")
	} else {
		fmt.Println("NO")
	}
}