如何对特定数字中的数字进行分类？

def classify_numbers(number):
    number_str = str(number)
    even_numbers = []
    odd_numbers = []
    prime_numbers = []
    positive_numbers = []
    negative_numbers = []

    for digit in number_str:
        if int(digit) % 2 == 0:
            even_numbers.append(int(digit))
        else:
            odd_numbers.append(int(digit))

        if int(digit) > 0:
            positive_numbers.append(int(digit))
        elif int(digit) < 0:
            negative_numbers.append(int(digit))

        if is_prime(int(digit)):
            prime_numbers.append(int(digit))

    print("Even numbers:", even_numbers)
    print("Odd numbers:", odd_numbers)
    print("Prime numbers:", prime_numbers)
    print("Positive numbers:", positive_numbers)
    print("Negative numbers:", negative_numbers)

def is_prime(number):
    if number < 2:
        return False
    for i in range(2, int(number ** 0.5) + 1):
        if number % i == 0:
            return False
    return True

# 示例调用
classify_numbers(123456789)

Even numbers: [2, 4, 6, 8]
Odd numbers: [1, 3, 5, 7, 9]
Prime numbers: [2, 3, 5, 7]
Positive numbers: [1, 2, 3, 4, 5, 6, 7, 8, 9]
Negative numbers: []