868589 has 4 divisors (see below), whose sum is σ = 896640. Its totient is φ = 840540.

The previous prime is 868583. The next prime is 868603. The reversal of 868589 is 985868.

868589 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 868589 - 2¹⁶ = 803053 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (868583) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13979 + ... + 14040.

It is an arithmetic number, because the mean of its divisors is an integer number (224160).

2⁸⁶⁸⁵⁸⁹ is an apocalyptic number.

It is an amenable number.

868589 is a deficient number, since it is larger than the sum of its proper divisors (28051).

868589 is a wasteful number, since it uses less digits than its factorization.

868589 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28050.

The product of its digits is 138240, while the sum is 44.

The square root of 868589 is about 931.9812229868. The cubic root of 868589 is about 95.4123900712.

The spelling of 868589 in words is "eight hundred sixty-eight thousand, five hundred eighty-nine".