138926 has 4 divisors (see below), whose sum is σ = 208392. Its totient is φ = 69462.

The previous prime is 138923. The next prime is 138937. The reversal of 138926 is 629831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 629831 = 19 ⋅33149.

It is an Ulam number.

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 138926.

It is not an unprimeable number, because it can be changed into a prime (138923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34730 + ... + 34733.

It is an arithmetic number, because the mean of its divisors is an integer number (52098).

2¹³⁸⁹²⁶ is an apocalyptic number.

138926 is a deficient number, since it is larger than the sum of its proper divisors (69466).

138926 is an equidigital number, since it uses as much as digits as its factorization.

138926 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69465.

The product of its digits is 2592, while the sum is 29.

The square root of 138926 is about 372.7277827048. The cubic root of 138926 is about 51.7918205358.

The spelling of 138926 in words is "one hundred thirty-eight thousand, nine hundred twenty-six".