99022391 has 8 divisors (see below), whose sum is σ = 108652320. Its totient is φ = 89680032.

The previous prime is 99022369. The next prime is 99022447. The reversal of 99022391 is 19322099.

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

It is not a de Polignac number, because 99022391 - 2¹⁸ = 98760247 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 (99022361) 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, 71171 + ... + 72548.

It is an arithmetic number, because the mean of its divisors is an integer number (13581540).

Almost surely, 2^99022391 is an apocalyptic number.

99022391 is a deficient number, since it is larger than the sum of its proper divisors (9629929).

99022391 is a wasteful number, since it uses less digits than its factorization.

99022391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143785.

The product of its (nonzero) digits is 8748, while the sum is 35.

The square root of 99022391 is about 9950.9994975379. Note that the first 3 decimals coincide. The cubic root of 99022391 is about 462.6413744582.

The spelling of 99022391 in words is "ninety-nine million, twenty-two thousand, three hundred ninety-one".