90631900 has 36 divisors (see below), whose sum is σ = 207026680. Its totient is φ = 34344000.

The previous prime is 90631897. The next prime is 90631903. The reversal of 90631900 is 913609.

It is a happy number.

90631900 is digitally balanced in base 9, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (90631897) and next prime (90631903).

It is a super-3 number, since 3×90631900³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

90631900 is strictly pandigital in base 9.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90631903) 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 11 ways as a sum of consecutive naturals, for example, 21951 + ... + 25750.

Almost surely, 2^90631900 is an apocalyptic number.

It is an amenable number.

90631900 is an abundant number, since it is smaller than the sum of its proper divisors (116394780).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

90631900 is a wasteful number, since it uses less digits than its factorization.

90631900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47734 (or 47727 counting only the distinct ones).

The product of its (nonzero) digits is 1458, while the sum is 28.

The square root of 90631900 is about 9520.0787811866. The cubic root of 90631900 is about 449.1868442595.

The spelling of 90631900 in words is "ninety million, six hundred thirty-one thousand, nine hundred".