99139091 has 8 divisors (see below), whose sum is σ = 101508384. Its totient is φ = 96793920.

The previous prime is 99139069. The next prime is 99139099. The reversal of 99139091 is 19093199.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99139091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99139099) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2426 + ... + 14288.

It is an arithmetic number, because the mean of its divisors is an integer number (12688548).

Almost surely, 2^99139091 is an apocalyptic number.

99139091 is a deficient number, since it is larger than the sum of its proper divisors (2369293).

99139091 is a wasteful number, since it uses less digits than its factorization.

99139091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12061.

The product of its (nonzero) digits is 19683, while the sum is 41.

The square root of 99139091 is about 9956.8615035060. The cubic root of 99139091 is about 462.8230473511.

The spelling of 99139091 in words is "ninety-nine million, one hundred thirty-nine thousand, ninety-one".