import sys; input = sys.stdin.buffer.readline
sys.setrecursionlimit(10**7)
from collections import defaultdict
con = 10 ** 9 + 7; INF = float("inf")

def getlist():
	return list(map(int, input().split()))

#処理内容
def main():
	N = int(input())
	if N == 1:
		print("NO")
		return

	n = int(N ** 0.5)
	for i in range(2, min(n + 2, N)):
		if N % i == 0:
			print("YES")
			return

	print("NO")


if __name__ == '__main__':
	main()