90625405 has 24 divisors (see below), whose sum is σ = 122905728. Its totient is φ = 63999936.

The previous prime is 90625397. The next prime is 90625417. The reversal of 90625405 is 50452609.

It is not a de Polignac number, because 90625405 - 2³ = 90625397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 17104 + ... + 21766.

It is an arithmetic number, because the mean of its divisors is an integer number (5121072).

Almost surely, 2^90625405 is an apocalyptic number.

It is an amenable number.

90625405 is a deficient number, since it is larger than the sum of its proper divisors (32280323).

90625405 is a wasteful number, since it uses less digits than its factorization.

90625405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4717 (or 4704 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 90625405 is about 9519.7376539482. The cubic root of 90625405 is about 449.1761139013.

The spelling of 90625405 in words is "ninety million, six hundred twenty-five thousand, four hundred five".