Only 2 is an even number and a prime number, only 1 is neither a prime number nor a sum, the smallest composite number is 4, and the largest odd number is 9, which is both a factor of 2 and a multiple of 3, so this number is a multiple of 2 and 3 * * *, which is 6, and the smallest natural number is 0. In a word, the phone number is 0833.