99999000813 has 16 divisors (see below), whose sum is σ = 134398607616. Its totient is φ = 66134810880.

The previous prime is 99999000811. The next prime is 99999000869. The reversal of 99999000813 is 31800099999.

It is not a de Polignac number, because 99999000813 - 2¹ = 99999000811 is a prime.

It is a congruent number.

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

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 74520 + ... + 453377.

It is an arithmetic number, because the mean of its divisors is an integer number (8399912976).

Almost surely, 2^99999000813 is an apocalyptic number.

It is an amenable number.

99999000813 is a deficient number, since it is larger than the sum of its proper divisors (34399606803).

99999000813 is a wasteful number, since it uses less digits than its factorization.

99999000813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 528404.

The product of its (nonzero) digits is 1417176, while the sum is 57.

The spelling of 99999000813 in words is "ninety-nine billion, nine hundred ninety-nine million, eight hundred thirteen", and thus it is an aban number.