import math

n = int(input())

sq = math.ceil(math.sqrt(n))
cnt = 0
d = 2
while n > 1 and d <= sq:
  if n % d == 0:
    cnt += 1
    n //= d
    if cnt >= 2:
      break
  else:
    d += 1
res = 'NO'
if cnt >= 2 and n > 1:
  res = 'YES'

print(res)