99999000812 has 36 divisors (see below), whose sum is σ = 183083125680. Its totient is φ = 47787587232.

The previous prime is 99999000811. The next prime is 99999000869. The reversal of 99999000812 is 21800099999.

It is not an unprimeable number, because it can be changed into a prime (99999000811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2739014 + ... + 2775282.

It is an arithmetic number, because the mean of its divisors is an integer number (5085642380).

Almost surely, 2^99999000812 is an apocalyptic number.

99999000812 is a gapful number since it is divisible by the number (92) formed by its first and last digit.

It is an amenable number.

99999000812 is a deficient number, since it is larger than the sum of its proper divisors (83084124868).

99999000812 is a wasteful number, since it uses less digits than its factorization.

99999000812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37622 (or 37597 counting only the distinct ones).

The product of its (nonzero) digits is 944784, while the sum is 56.

The spelling of 99999000812 in words is "ninety-nine billion, nine hundred ninety-nine million, eight hundred twelve", and thus it is an aban number.