138263875 has 24 divisors (see below), whose sum is σ = 178454016. Its totient is φ = 106950000.

The previous prime is 138263863. The next prime is 138263887. The reversal of 138263875 is 578362831.

It is an interprime number because it is at equal distance from previous prime (138263863) and next prime (138263887).

It is not a de Polignac number, because 138263875 - 2⁵ = 138263843 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 119550 + ... + 120700.

It is an arithmetic number, because the mean of its divisors is an integer number (7435584).

Almost surely, 2^138263875 is an apocalyptic number.

138263875 is a deficient number, since it is larger than the sum of its proper divisors (40190141).

138263875 is an equidigital number, since it uses as much as digits as its factorization.

138263875 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1228 (or 1187 counting only the distinct ones).

The product of its digits is 241920, while the sum is 43.

The square root of 138263875 is about 11758.5660265187. The cubic root of 138263875 is about 517.0940907508.

The spelling of 138263875 in words is "one hundred thirty-eight million, two hundred sixty-three thousand, eight hundred seventy-five".