l=lambda:map(int,raw_input().split())
def isprime(n):
	if n==2:return True
	if n<2 or n&1==0:return False
	for i in xrange(3,int(n**0.5)+2,2):
		if n%i==0:
			return False
	return True
n=l()[0]
print["YES","NO"][isprime(n)]
exit()
if n!=2 and n%2==0:
	print"YES"
	exit()
for i in xrange(2,n):
	if isprime(i):
		continue
	if n%i==0:
		print"YES"
		break
else:
	print"NO"