import strutils
import tables

proc prime_factor_elements(n : int) : CountTable[int] =
  result = initCountTable[int]()
  var n = n
  var i = 2
  while i * i <= n:
    while n mod i == 0:
      result.inc(i, 1)
      n = n div i
    i += 1
  if n > 1: result.inc(n, 1)

var N = stdin.readLine.parseInt
let k = (prime_factor_elements(N))
if k.len >= 3:
  echo "YES"
else:
  echo "NO"