90057057 has 8 divisors (see below), whose sum is σ = 120158976. Its totient is φ = 59996592.

The previous prime is 90057047. The next prime is 90057061. The reversal of 90057057 is 75075009.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 90057057 - 2¹⁵ = 90024289 is a prime.

It is a super-2 number, since 2×90057057² = 16220547031002498, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (90057047) 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 7 ways as a sum of consecutive naturals, for example, 4878 + ... + 14279.

It is an arithmetic number, because the mean of its divisors is an integer number (15019872).

Almost surely, 2^90057057 is an apocalyptic number.

It is an amenable number.

90057057 is a deficient number, since it is larger than the sum of its proper divisors (30101919).

90057057 is a wasteful number, since it uses less digits than its factorization.

90057057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20727.

The product of its (nonzero) digits is 11025, while the sum is 33.

The square root of 90057057 is about 9489.8396719860. The cubic root of 90057057 is about 448.2351566911.

The spelling of 90057057 in words is "ninety million, fifty-seven thousand, fifty-seven".