99000891 has 24 divisors (see below), whose sum is σ = 156579696. Its totient is φ = 59778240.

The previous prime is 99000883. The next prime is 99000893. The reversal of 99000891 is 19800099.

It is not a de Polignac number, because 99000891 - 2³ = 99000883 is a prime.

99000891 is a modest number, since divided by 891 gives 99 as remainder.

It is not an unprimeable number, because it can be changed into a prime (99000893) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27301 + ... + 30713.

It is an arithmetic number, because the mean of its divisors is an integer number (6524154).

Almost surely, 2^99000891 is an apocalyptic number.

99000891 is a deficient number, since it is larger than the sum of its proper divisors (57578805).

99000891 is a wasteful number, since it uses less digits than its factorization.

99000891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3723 (or 3720 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 36.

The square root of 99000891 is about 9949.9191454001. The cubic root of 99000891 is about 462.6078887336.

It can be divided in two parts, 990008 and 91, that added together give a palindrome (990099).

The spelling of 99000891 in words is "ninety-nine million, eight hundred ninety-one", and thus it is an aban number.