90022399 has 4 divisors (see below), whose sum is σ = 94760440. Its totient is φ = 85284360.

The previous prime is 90022393. The next prime is 90022403. The reversal of 90022399 is 99322009.

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 90022399 - 2⁵ = 90022367 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 (90022393) 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, 2368992 + ... + 2369029.

It is an arithmetic number, because the mean of its divisors is an integer number (23690110).

Almost surely, 2^90022399 is an apocalyptic number.

90022399 is a deficient number, since it is larger than the sum of its proper divisors (4738041).

90022399 is a wasteful number, since it uses less digits than its factorization.

90022399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4738040.

The product of its (nonzero) digits is 8748, while the sum is 34.

The square root of 90022399 is about 9488.0134380175. The cubic root of 90022399 is about 448.1776489738.

The spelling of 90022399 in words is "ninety million, twenty-two thousand, three hundred ninety-nine".