138387875 has 32 divisors (see below), whose sum is σ = 181149696. Its totient is φ = 105420000.

The previous prime is 138387869. The next prime is 138387883. The reversal of 138387875 is 578783831.

138387875 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 138387875 - 2¹⁴ = 138371491 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 274874 + ... + 275376.

It is an arithmetic number, because the mean of its divisors is an integer number (5660928).

Almost surely, 2^138387875 is an apocalyptic number.

138387875 is a deficient number, since it is larger than the sum of its proper divisors (42761821).

138387875 is an equidigital number, since it uses as much as digits as its factorization.

138387875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 620 (or 610 counting only the distinct ones).

The product of its digits is 1128960, while the sum is 50.

The square root of 138387875 is about 11763.8375966349. The cubic root of 138387875 is about 517.2486274016.

The spelling of 138387875 in words is "one hundred thirty-eight million, three hundred eighty-seven thousand, eight hundred seventy-five".