N=int(input())
f=False
P=[2]
if N!=1 and N!=2:
  for j in range(3,int(N**0.5)):
    p=False
    k=0
    while (not p) and k<len(P) and P[k]<=j**0.5:
      p|=j%P[k]==0
      if p: break
      k+=1
    if p:
      if N%j==0:
        f=True
        break
    else: P.append(j)
print("YES" if f else "NO")