R=range
N=int(input())
m=2
M=10**6
for i in R(2):
	s=1
	for p in R(m,M):
		if N%p==0:
			while N%p==0:
				N//=p
			m=p+1
			s=0
			break
	if N==1 or s==1:
		print("Yes")
		exit(0)
print("No")