138873 has 16 divisors (see below), whose sum is σ = 224640. Its totient is φ = 74496.

The previous prime is 138869. The next prime is 138883. The reversal of 138873 is 378831.

It is not a de Polignac number, because 138873 - 2² = 138869 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 138873.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 138873.

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 15 ways as a sum of consecutive naturals, for example, 163 + ... + 551.

It is an arithmetic number, because the mean of its divisors is an integer number (14040).

2¹³⁸⁸⁷³ is an apocalyptic number.

It is an amenable number.

138873 is a deficient number, since it is larger than the sum of its proper divisors (85767).

138873 is a wasteful number, since it uses less digits than its factorization.

138873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 416.

The product of its digits is 4032, while the sum is 30.

The square root of 138873 is about 372.6566784589. The cubic root of 138873 is about 51.7852335384.

The spelling of 138873 in words is "one hundred thirty-eight thousand, eight hundred seventy-three".