138237428723 has 16 divisors (see below), whose sum is σ = 147033048960. Its totient is φ = 129734438400.

The previous prime is 138237428647. The next prime is 138237428729. The reversal of 138237428723 is 327824732831.

It is a cyclic number.

It is not a de Polignac number, because 138237428723 - 2²⁰ = 138236380147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138237428729) 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, 107711 + ... + 536727.

It is an arithmetic number, because the mean of its divisors is an integer number (9189565560).

Almost surely, 2^138237428723 is an apocalyptic number.

138237428723 is a deficient number, since it is larger than the sum of its proper divisors (8795620237).

138237428723 is a wasteful number, since it uses less digits than its factorization.

138237428723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 429358.

The product of its digits is 2709504, while the sum is 50.

The spelling of 138237428723 in words is "one hundred thirty-eight billion, two hundred thirty-seven million, four hundred twenty-eight thousand, seven hundred twenty-three".