138841589 has 4 divisors (see below), whose sum is σ = 143629260. Its totient is φ = 134053920.

The previous prime is 138841579. The next prime is 138841603. The reversal of 138841589 is 985148831.

138841589 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.

It can be written as a sum of positive squares in 2 ways, for example, as 73393489 + 65448100 = 8567^2 + 8090^2 .

It is a cyclic number.

It is not a de Polignac number, because 138841589 - 2²⁰ = 137793013 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138841519) 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, 2393792 + ... + 2393849.

It is an arithmetic number, because the mean of its divisors is an integer number (35907315).

Almost surely, 2^138841589 is an apocalyptic number.

It is an amenable number.

138841589 is a deficient number, since it is larger than the sum of its proper divisors (4787671).

138841589 is an equidigital number, since it uses as much as digits as its factorization.

138841589 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4787670.

The product of its digits is 276480, while the sum is 47.

The square root of 138841589 is about 11783.1060845602. The cubic root of 138841589 is about 517.8132889498.

The spelling of 138841589 in words is "one hundred thirty-eight million, eight hundred forty-one thousand, five hundred eighty-nine".