99542691 has 24 divisors (see below), whose sum is σ = 155451920. Its totient is φ = 61166016.

The previous prime is 99542669. The next prime is 99542699. The reversal of 99542691 is 19624599.

It is not a de Polignac number, because 99542691 - 2⁵ = 99542659 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (99542699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1540 + ... + 14193.

Almost surely, 2^99542691 is an apocalyptic number.

99542691 is a deficient number, since it is larger than the sum of its proper divisors (55909229).

99542691 is a wasteful number, since it uses less digits than its factorization.

99542691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15795 (or 15792 counting only the distinct ones).

The product of its digits is 174960, while the sum is 45.

The square root of 99542691 is about 9977.1083486148. The cubic root of 99542691 is about 463.4502552717.

The spelling of 99542691 in words is "ninety-nine million, five hundred forty-two thousand, six hundred ninety-one".