import math

def isprime(n):
	if n == 1:
		return False
	else:
		for i in range(2, math.floor(math.sqrt(n))+1):
			if n % i == 0:
				return False
		return True

def bunnkai(n):
	pf = []
	for i in range(2, math.floor(math.sqrt(n))+1):
		if n % i == 0:
			pf.append(i)
			n //= i
	return pf

n = int(input())

if n == 1:
	print("NO")
elif isprime(n):
	print("NO")
elif float.is_integer(math.sqrt(n)):
	if isprime(math.floor(math.sqrt(n))):
		print("NO")
	else:
		print("YES")
else:
	soinsu = bunnkai(n)
	cnt = len(soinsu)
	if cnt == 1:
		if n%soinsu[0] == 0:
			print("YES")
		else:
			print("NO")
	else:
		print("YES")