99831312 has 80 divisors (see below), whose sum is σ = 327498880. Its totient is φ = 28522368.

The previous prime is 99831289. The next prime is 99831313. The reversal of 99831312 is 21313899.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (99831313) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 13483 + ... + 19530.

It is an arithmetic number, because the mean of its divisors is an integer number (4093736).

Almost surely, 2^99831312 is an apocalyptic number.

It is an amenable number.

99831312 is an abundant number, since it is smaller than the sum of its proper divisors (227667568).

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

99831312 is a wasteful number, since it uses less digits than its factorization.

99831312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33037 (or 33025 counting only the distinct ones).

The product of its digits is 11664, while the sum is 36.

The square root of 99831312 is about 9991.5620400416. The cubic root of 99831312 is about 463.8977430230.

The spelling of 99831312 in words is "ninety-nine million, eight hundred thirty-one thousand, three hundred twelve".