package main

import (
	"fmt"
	"math"
)

func main() {
	var n int
	_, _ = fmt.Scan(&n)

	nums := make([]int, int(math.Ceil(math.Sqrt(float64(n))))+1)
	nums[0], nums[1] = 1, 1

	for i, v := range nums {
		if i == 0 || i == 1 || v != 0 {
			continue
		}

		for j := i + i; j < len(nums)-1; j += i {
			if n%i == 0 {
				fmt.Println("YES")
				return
			}

			nums[j] = 1
		}
	}

	fmt.Println("NO")
}