138187 has 8 divisors (see below), whose sum is σ = 166400. Its totient is φ = 112104.

The previous prime is 138181. The next prime is 138191. The reversal of 138187 is 781831.

It is a happy number.

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 138187 - 2³ = 138179 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138181) 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, 387 + ... + 652.

It is an arithmetic number, because the mean of its divisors is an integer number (20800).

2¹³⁸¹⁸⁷ is an apocalyptic number.

138187 is a deficient number, since it is larger than the sum of its proper divisors (28213).

138187 is a wasteful number, since it uses less digits than its factorization.

138187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1065.

The product of its digits is 1344, while the sum is 28.

The square root of 138187 is about 371.7351207513. The cubic root of 138187 is about 51.6998237856.

It can be divided in two parts, 138 and 187, that added together give a triangular number (325 = T₂₅).

The spelling of 138187 in words is "one hundred thirty-eight thousand, one hundred eighty-seven".