138589 has 8 divisors (see below), whose sum is σ = 155232. Its totient is φ = 122640.

The previous prime is 138587. The next prime is 138599. The reversal of 138589 is 985831.

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

It is a cyclic number.

It is not a de Polignac number, because 138589 - 2¹ = 138587 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138581) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 327 + ... + 619.

It is an arithmetic number, because the mean of its divisors is an integer number (19404).

2¹³⁸⁵⁸⁹ is an apocalyptic number.

It is an amenable number.

138589 is a deficient number, since it is larger than the sum of its proper divisors (16643).

138589 is a wasteful number, since it uses less digits than its factorization.

138589 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 347.

The product of its digits is 8640, while the sum is 34.

The square root of 138589 is about 372.2754356656. The cubic root of 138589 is about 51.7499085936.

It can be divided in two parts, 138 and 589, that added together give a palindrome (727).

The spelling of 138589 in words is "one hundred thirty-eight thousand, five hundred eighty-nine".