99108491 has 4 divisors (see below), whose sum is σ = 99129072. Its totient is φ = 99087912.

The previous prime is 99108481. The next prime is 99108509. The reversal of 99108491 is 19480199.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 99108491 - 2¹⁴ = 99092107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99108461) 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 3 ways as a sum of consecutive naturals, for example, 1241 + ... + 14133.

It is an arithmetic number, because the mean of its divisors is an integer number (24782268).

Almost surely, 2^99108491 is an apocalyptic number.

99108491 is a deficient number, since it is larger than the sum of its proper divisors (20581).

99108491 is a wasteful number, since it uses less digits than its factorization.

99108491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20580.

The product of its (nonzero) digits is 23328, while the sum is 41.

The square root of 99108491 is about 9955.3247561293. The cubic root of 99108491 is about 462.7754245535.

It can be divided in two parts, 99108 and 491, that added together give a palindrome (99599).

The spelling of 99108491 in words is "ninety-nine million, one hundred eight thousand, four hundred ninety-one".