import math
N = int(input())

div = []
n = N
i = 2

limit = int(math.sqrt(N))

while (i <= limit) :
    if (n % i == 0) :
        n //= i
        break
    else :
        i += 1

if (n == N or n == i):
    print('NO')
else :
    limit = int(math.sqrt(n))
    while (i <= limit) :
        if (n % i == 0) :
            n //= i
            break
        else :
            i += 1
    if i == limit + 1 :
        print('NO')
    else :
        print('YES')