n=int(input())
l=list(range(2,int(n**(1/3))))
c=0
while c<3 and len(l)>0:
	t=l[0];
	if n%t<1:
		c+=1
		if n%(t*t)<1: c=3; break
	l=[i for i in l if i%t>0]
print("YES" if c>2 else "NO")