90385 has 4 divisors (see below), whose sum is σ = 108468. Its totient is φ = 72304.

The previous prime is 90379. The next prime is 90397. The reversal of 90385 is 58309.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 66049 + 24336 = 257^2 + 156^2 .

It is a cyclic number.

It is not a de Polignac number, because 90385 - 2⁵ = 90353 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9034 + ... + 9043.

It is an arithmetic number, because the mean of its divisors is an integer number (27117).

2⁹⁰³⁸⁵ is an apocalyptic number.

It is an amenable number.

90385 is a deficient number, since it is larger than the sum of its proper divisors (18083).

90385 is a wasteful number, since it uses less digits than its factorization.

90385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18082.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 90385 is about 300.6409819037. The cubic root of 90385 is about 44.8778580748.

The spelling of 90385 in words is "ninety thousand, three hundred eighty-five".