99131893 has 16 divisors (see below), whose sum is σ = 118881280. Its totient is φ = 80870400.

The previous prime is 99131887. The next prime is 99131897. The reversal of 99131893 is 39813199.

It is a cyclic number.

It is not a de Polignac number, because 99131893 - 2⁵ = 99131861 is a prime.

It is the 9957-th Hogben number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99131897) by changing a digit.

It is a nontrivial repunit in base 9956.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9493 + ... + 16981.

It is an arithmetic number, because the mean of its divisors is an integer number (7430080).

Almost surely, 2^99131893 is an apocalyptic number.

It is an amenable number.

99131893 is a deficient number, since it is larger than the sum of its proper divisors (19749387).

99131893 is a wasteful number, since it uses less digits than its factorization.

99131893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7588.

The product of its digits is 52488, while the sum is 43.

The square root of 99131893 is about 9956.5000376638. The cubic root of 99131893 is about 462.8118459811.

The spelling of 99131893 in words is "ninety-nine million, one hundred thirty-one thousand, eight hundred ninety-three".