99431442 has 32 divisors (see below), whose sum is σ = 241047360. Its totient is φ = 30130560.

The previous prime is 99431413. The next prime is 99431443. The reversal of 99431442 is 24413499.

It is a super-2 number, since 2×99431442² = 19773223316398728, which contains 22 as substring.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 99431397 and 99431406.

It is not an unprimeable number, because it can be changed into a prime (99431443) 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, 83103 + ... + 84290.

It is an arithmetic number, because the mean of its divisors is an integer number (7532730).

Almost surely, 2^99431442 is an apocalyptic number.

99431442 is an abundant number, since it is smaller than the sum of its proper divisors (141615918).

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

99431442 is a wasteful number, since it uses less digits than its factorization.

99431442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167415 (or 167409 counting only the distinct ones).

The product of its digits is 31104, while the sum is 36.

The square root of 99431442 is about 9971.5315774459. The cubic root of 99431442 is about 463.2775401077.

The spelling of 99431442 in words is "ninety-nine million, four hundred thirty-one thousand, four hundred forty-two".