fun main(arr:Array<String>) {
    val num = readLine()!!.toLong()
    val ans = if(canUse(num)) "YES" else "NO"
    println(ans)
}

fun canUse(num:Long):Boolean {
    var cur = 2.toLong()
    while (cur * cur < num) {
        if(num % cur == 0.toLong()) {
            return true
        }
        cur++
    }
    return false
}