90391825 has 12 divisors (see below), whose sum is σ = 112428940. Its totient is φ = 72092160.

The previous prime is 90391793. The next prime is 90391837. The reversal of 90391825 is 52819309.

It can be written as a sum of positive squares in 6 ways, for example, as 1580049 + 88811776 = 1257^2 + 9424^2 .

It is not a de Polignac number, because 90391825 - 2⁵ = 90391793 is a prime.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3061 + ... + 13789.

Almost surely, 2^90391825 is an apocalyptic number.

It is an amenable number.

90391825 is a deficient number, since it is larger than the sum of its proper divisors (22037115).

90391825 is a wasteful number, since it uses less digits than its factorization.

90391825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11076 (or 11071 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 37.

The square root of 90391825 is about 9507.4615434405. The cubic root of 90391825 is about 448.7898762681.

The spelling of 90391825 in words is "ninety million, three hundred ninety-one thousand, eight hundred twenty-five".