138088687 has 12 divisors (see below), whose sum is σ = 151880616. Its totient is φ = 124510320.

The previous prime is 138088673. The next prime is 138088693. The reversal of 138088687 is 786880831.

138088687 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 138088687 - 2¹¹ = 138086639 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 138088687.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138088487) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 435453 + ... + 435769.

It is an arithmetic number, because the mean of its divisors is an integer number (12656718).

Almost surely, 2^138088687 is an apocalyptic number.

138088687 is a deficient number, since it is larger than the sum of its proper divisors (13791929).

138088687 is an equidigital number, since it uses as much as digits as its factorization.

138088687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 726 (or 527 counting only the distinct ones).

The product of its (nonzero) digits is 516096, while the sum is 49.

The square root of 138088687 is about 11751.1142875899. The cubic root of 138088687 is about 516.8756028128.

The spelling of 138088687 in words is "one hundred thirty-eight million, eighty-eight thousand, six hundred eighty-seven".