90581625 has 32 divisors (see below), whose sum is σ = 167481600. Its totient is φ = 48308400.

The previous prime is 90581609. The next prime is 90581629. The reversal of 90581625 is 52618509.

It is a happy number.

It is not a de Polignac number, because 90581625 - 2⁴ = 90581609 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 90581625.

It is not an unprimeable number, because it can be changed into a prime (90581629) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10045 + ... + 16794.

It is an arithmetic number, because the mean of its divisors is an integer number (5233800).

Almost surely, 2^90581625 is an apocalyptic number.

It is an amenable number.

90581625 is a deficient number, since it is larger than the sum of its proper divisors (76899975).

90581625 is a wasteful number, since it uses less digits than its factorization.

90581625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26863 (or 26847 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 36.

The square root of 90581625 is about 9517.4379430601. The cubic root of 90581625 is about 449.1037717961.

The spelling of 90581625 in words is "ninety million, five hundred eighty-one thousand, six hundred twenty-five".