90422997 has 16 divisors (see below), whose sum is σ = 137920512. Its totient is φ = 51620400.

The previous prime is 90422993. The next prime is 90423007. The reversal of 90422997 is 79922409.

It is not a de Polignac number, because 90422997 - 2² = 90422993 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90422993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39868 + ... + 42074.

It is an arithmetic number, because the mean of its divisors is an integer number (8620032).

Almost surely, 2^90422997 is an apocalyptic number.

It is an amenable number.

90422997 is a deficient number, since it is larger than the sum of its proper divisors (47497515).

90422997 is a wasteful number, since it uses less digits than its factorization.

90422997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4168.

The product of its (nonzero) digits is 81648, while the sum is 42.

The square root of 90422997 is about 9509.1007461274. The cubic root of 90422997 is about 448.8414593627.

It can be divided in two parts, 90422 and 997, that added together give a palindrome (91419).

The spelling of 90422997 in words is "ninety million, four hundred twenty-two thousand, nine hundred ninety-seven".