import sequtils,strutils,strscans,algorithm,math,future,macros
template get*():string = stdin.readLine()

proc getIsPrimes(n:int) :seq[bool] = # [0...n]
  result = newSeqWith(n+1,true)
  result[0] = false
  result[1] = false
  for i in 2..n.float.sqrt.int :
    if not result[i]: continue
    for j in countup(i*2,n,i):
      result[j] = false

proc getPrimes(n:int):seq[int] = # [2,3,5,...n]
  let isPrimes = getIsPrimes(n)
  result = @[]
  for i,p in isPrimes:
    if p : result &= i

proc getIsPrime(n:int) : bool = # O(N/2)
  let primes = getPrimes(n.float.sqrt.int + 1)
  for p in primes:
    if n mod p == 0 and n != p:
      return false
  return true

let N = get().parseInt()
if N == 1 or getIsPrime(N):
  echo "NO"
else:
  echo "YES"