99131892 has 48 divisors (see below), whose sum is σ = 245414400. Its totient is φ = 31056480.

The previous prime is 99131887. The next prime is 99131897. The reversal of 99131892 is 29813199.

It is an interprime number because it is at equal distance from previous prime (99131887) and next prime (99131897).

It is a super-2 number, since 2×99131892² = 19654264022999328, which contains 22 as substring.

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 polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28209 + ... + 31527.

It is an arithmetic number, because the mean of its divisors is an integer number (5112800).

Almost surely, 2^99131892 is an apocalyptic number.

It is a pronic number, being equal to 9956×9957.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 99131892, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (122707200).

99131892 is an abundant number, since it is smaller than the sum of its proper divisors (146282508).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

99131892 is a wasteful number, since it uses less digits than its factorization.

99131892 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3476 (or 3474 counting only the distinct ones).

The product of its digits is 34992, while the sum is 42.

The square root of 99131892 is about 9956.4999874454. The cubic root of 99131892 is about 462.8118444249.

The spelling of 99131892 in words is "ninety-nine million, one hundred thirty-one thousand, eight hundred ninety-two".