99371091 has 4 divisors (see below), whose sum is σ = 132494792. Its totient is φ = 66247392.

The previous prime is 99371087. The next prime is 99371099. The reversal of 99371091 is 19017399.

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

It is not a de Polignac number, because 99371091 - 2² = 99371087 is a prime.

It is a super-2 number, since 2×99371091² = 19749227453060562, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99371099) 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, 16561846 + ... + 16561851.

It is an arithmetic number, because the mean of its divisors is an integer number (33123698).

Almost surely, 2^99371091 is an apocalyptic number.

99371091 is a deficient number, since it is larger than the sum of its proper divisors (33123701).

99371091 is a wasteful number, since it uses less digits than its factorization.

99371091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33123700.

The product of its (nonzero) digits is 15309, while the sum is 39.

The square root of 99371091 is about 9968.5049531010. The cubic root of 99371091 is about 463.1837906829.

The spelling of 99371091 in words is "ninety-nine million, three hundred seventy-one thousand, ninety-one".