99131838 has 32 divisors (see below), whose sum is σ = 214158336. Its totient is φ = 30410208.

The previous prime is 99131827. The next prime is 99131861. The reversal of 99131838 is 83813199.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 99131838.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26895 + ... + 30357.

It is an arithmetic number, because the mean of its divisors is an integer number (6692448).

Almost surely, 2^99131838 is an apocalyptic number.

99131838 is an abundant number, since it is smaller than the sum of its proper divisors (115026498).

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

99131838 is a wasteful number, since it uses less digits than its factorization.

99131838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3848.

The product of its digits is 46656, while the sum is 42.

The square root of 99131838 is about 9956.4972756487. The cubic root of 99131838 is about 462.8117603892.

The spelling of 99131838 in words is "ninety-nine million, one hundred thirty-one thousand, eight hundred thirty-eight".