99040591 has 12 divisors (see below), whose sum is σ = 108267192. Its totient is φ = 90551136.

The previous prime is 99040573. The next prime is 99040607. The reversal of 99040591 is 19504099.

It is not a de Polignac number, because 99040591 - 2⁷ = 99040463 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 99040591.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99040511) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15345 + ... + 20821.

It is an arithmetic number, because the mean of its divisors is an integer number (9022266).

Almost surely, 2^99040591 is an apocalyptic number.

99040591 is a deficient number, since it is larger than the sum of its proper divisors (9226601).

99040591 is a wasteful number, since it uses less digits than its factorization.

99040591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5610 (or 5597 counting only the distinct ones).

The product of its (nonzero) digits is 14580, while the sum is 37.

The square root of 99040591 is about 9951.9139365250. The cubic root of 99040591 is about 462.6697167254.

The spelling of 99040591 in words is "ninety-nine million, forty thousand, five hundred ninety-one".