90657873 has 20 divisors (see below), whose sum is σ = 142557360. Its totient is φ = 57256632.

The previous prime is 90657871. The next prime is 90657887. The reversal of 90657873 is 37875609.

It is a happy number.

90657873 is a `hidden beast` number, since 9 + 0 + 6 + 578 + 73 = 666.

It is not a de Polignac number, because 90657873 - 2¹ = 90657871 is a prime.

It is not an unprimeable number, because it can be changed into a prime (90657871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 27915 + ... + 30992.

It is an arithmetic number, because the mean of its divisors is an integer number (7127868).

Almost surely, 2^90657873 is an apocalyptic number.

It is an amenable number.

90657873 is a deficient number, since it is larger than the sum of its proper divisors (51899487).

90657873 is a wasteful number, since it uses less digits than its factorization.

90657873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58938 (or 58929 counting only the distinct ones).

The product of its (nonzero) digits is 317520, while the sum is 45.

The square root of 90657873 is about 9521.4428003323. The cubic root of 90657873 is about 449.2297490042.

The spelling of 90657873 in words is "ninety million, six hundred fifty-seven thousand, eight hundred seventy-three".