N=int(input())
import math
X=math.ceil(pow(N,0.5))
L=[1 for i in range(X+1)]
if N==2:
    print("NO")
    exit()
for i in range(2,X+1):
    if L[i]==1:
        if N%i==0:
            print("YES")
            exit()
        for j in range(i*2,X,i):
            #print(i,j)
            L[j]=0
print("NO")