138206875 has 20 divisors (see below), whose sum is σ = 173588184. Its totient is φ = 110000000.

The previous prime is 138206867. The next prime is 138206891. The reversal of 138206875 is 578602831.

It is not a de Polignac number, because 138206875 - 2³ = 138206867 is a prime.

It is a super-2 number, since 2×138206875² = 38202280594531250, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 156435 + ... + 157315.

Almost surely, 2^138206875 is an apocalyptic number.

138206875 is a deficient number, since it is larger than the sum of its proper divisors (35381309).

138206875 is an frugal number, since it uses more digits than its factorization.

138206875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1152 (or 1137 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 40.

The square root of 138206875 is about 11756.1420117316. The cubic root of 138206875 is about 517.0230227430.

The spelling of 138206875 in words is "one hundred thirty-eight million, two hundred six thousand, eight hundred seventy-five".