138015589 has 4 divisors (see below), whose sum is σ = 138168000. Its totient is φ = 137863180.

The previous prime is 138015583. The next prime is 138015643. The reversal of 138015589 is 985510831.

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 138015589 - 2⁵ = 138015557 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138015583) 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, 74839 + ... + 76660.

It is an arithmetic number, because the mean of its divisors is an integer number (34542000).

Almost surely, 2^138015589 is an apocalyptic number.

It is an amenable number.

138015589 is a deficient number, since it is larger than the sum of its proper divisors (152411).

138015589 is an equidigital number, since it uses as much as digits as its factorization.

138015589 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152410.

The product of its (nonzero) digits is 43200, while the sum is 40.

The square root of 138015589 is about 11748.0036176365. The cubic root of 138015589 is about 516.7843830748.

The spelling of 138015589 in words is "one hundred thirty-eight million, fifteen thousand, five hundred eighty-nine".