87589 has 2 divisors, whose sum is σ = 87590. Its totient is φ = 87588.

The previous prime is 87587. The next prime is 87613. The reversal of 87589 is 98578.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66564 + 21025 = 258^2 + 145^2 .

It is a cyclic number.

It is not a de Polignac number, because 87589 - 2¹ = 87587 is a prime.

Together with 87587, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87583) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43794 + 43795.

It is an arithmetic number, because the mean of its divisors is an integer number (43795).

2⁸⁷⁵⁸⁹ is an apocalyptic number.

It is an amenable number.

87589 is a deficient number, since it is larger than the sum of its proper divisors (1).

87589 is an equidigital number, since it uses as much as digits as its factorization.

87589 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20160, while the sum is 37.

The square root of 87589 is about 295.9543883777. The cubic root of 87589 is about 44.4102470735.

It can be divided in two parts, 87 and 589, that added together give a palindrome (676).

The spelling of 87589 in words is "eighty-seven thousand, five hundred eighty-nine".