import math
N = long(raw_input())
L =long(math.ceil(math.sqrt(N)))
i = 2
c = 0
while i * i <= N:
	while N % i == 0:
		N /= i
		c += 1
	i += 1
if N > 1:c += 1
print 'YES' if c >= 3 else 'NO'