90889 has 4 divisors (see below), whose sum is σ = 91924. Its totient is φ = 89856.

The previous prime is 90887. The next prime is 90901. The reversal of 90889 is 98809.

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 19600 + 71289 = 140^2 + 267^2 .

It is a cyclic number.

It is not a de Polignac number, because 90889 - 2¹ = 90887 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 372 + ... + 565.

It is an arithmetic number, because the mean of its divisors is an integer number (22981).

2⁹⁰⁸⁸⁹ is an apocalyptic number.

It is an amenable number.

90889 is a deficient number, since it is larger than the sum of its proper divisors (1035).

90889 is an equidigital number, since it uses as much as digits as its factorization.

90889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1034.

The product of its (nonzero) digits is 5184, while the sum is 34.

The square root of 90889 is about 301.4780257332. The cubic root of 90889 is about 44.9611186784.

It can be divided in two parts, 90 and 889, that added together give a palindrome (979).

The spelling of 90889 in words is "ninety thousand, eight hundred eighty-nine".