138087 has 12 divisors (see below), whose sum is σ = 203320. Its totient is φ = 90288.

The previous prime is 138079. The next prime is 138101. The reversal of 138087 is 780831.

It is not a de Polignac number, because 138087 - 2³ = 138079 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 138087.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 138087.

It is not an unprimeable number, because it can be changed into a prime (138007) 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, 489 + ... + 717.

2¹³⁸⁰⁸⁷ is an apocalyptic number.

138087 is a deficient number, since it is larger than the sum of its proper divisors (65233).

138087 is a wasteful number, since it uses less digits than its factorization.

138087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 302 (or 299 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 27.

The square root of 138087 is about 371.6005920340. The cubic root of 138087 is about 51.6873497951.

It can be divided in two parts, 13 and 8087, that added together give a square (8100 = 90²).

The spelling of 138087 in words is "one hundred thirty-eight thousand, eighty-seven".