99999812 has 24 divisors (see below), whose sum is σ = 200958240. Its totient is φ = 43061760.

The previous prime is 99999787. The next prime is 99999821. The reversal of 99999812 is 21899999.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58973 + ... + 60644.

It is an arithmetic number, because the mean of its divisors is an integer number (8373260).

Almost surely, 2^99999812 is an apocalyptic number.

It is an amenable number.

99999812 is an abundant number, since it is smaller than the sum of its proper divisors (100958428).

99999812 is a wasteful number, since it uses less digits than its factorization.

99999812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119651 (or 119649 counting only the distinct ones).

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

The square root of 99999812 is about 9999.9905999956. The cubic root of 99999812 is about 464.1585924882.

The spelling of 99999812 in words is "ninety-nine million, nine hundred ninety-nine thousand, eight hundred twelve".