99232391 has 4 divisors (see below), whose sum is σ = 99254400. Its totient is φ = 99210384.

The previous prime is 99232381. The next prime is 99232429. The reversal of 99232391 is 19323299.

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 99232391 - 2¹⁰ = 99231367 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99232351) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1511 + ... + 14168.

It is an arithmetic number, because the mean of its divisors is an integer number (24813600).

Almost surely, 2^99232391 is an apocalyptic number.

99232391 is a deficient number, since it is larger than the sum of its proper divisors (22009).

99232391 is a wasteful number, since it uses less digits than its factorization.

99232391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22008.

The product of its digits is 26244, while the sum is 38.

The square root of 99232391 is about 9961.5456130060. The cubic root of 99232391 is about 462.9681897328.

The spelling of 99232391 in words is "ninety-nine million, two hundred thirty-two thousand, three hundred ninety-one".