99643432 has 16 divisors (see below), whose sum is σ = 213521760. Its totient is φ = 42704304.

The previous prime is 99643417. The next prime is 99643433. The reversal of 99643432 is 23434699.

It is not an unprimeable number, because it can be changed into a prime (99643433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 889618 + ... + 889729.

It is an arithmetic number, because the mean of its divisors is an integer number (13345110).

Almost surely, 2^99643432 is an apocalyptic number.

It is an amenable number.

99643432 is an abundant number, since it is smaller than the sum of its proper divisors (113878328).

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

99643432 is a wasteful number, since it uses less digits than its factorization.

99643432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1779360 (or 1779356 counting only the distinct ones).

The product of its digits is 139968, while the sum is 40.

The square root of 99643432 is about 9982.1556790104. The cubic root of 99643432 is about 463.6065456713.

The spelling of 99643432 in words is "ninety-nine million, six hundred forty-three thousand, four hundred thirty-two".