138867 has 8 divisors (see below), whose sum is σ = 189840. Its totient is φ = 90240.

The previous prime is 138863. The next prime is 138869. The reversal of 138867 is 768831.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 138867 - 2² = 138863 is a prime.

It is not an unprimeable number, because it can be changed into a prime (138863) 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, 442 + ... + 687.

It is an arithmetic number, because the mean of its divisors is an integer number (23730).

2¹³⁸⁸⁶⁷ is an apocalyptic number.

138867 is a deficient number, since it is larger than the sum of its proper divisors (50973).

138867 is a wasteful number, since it uses less digits than its factorization.

138867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1173.

The product of its digits is 8064, while the sum is 33.

The square root of 138867 is about 372.6486280667. The cubic root of 138867 is about 51.7844877349.

The spelling of 138867 in words is "one hundred thirty-eight thousand, eight hundred sixty-seven".