138375679 has 12 divisors (see below), whose sum is σ = 150206400. Its totient is φ = 127418304.

The previous prime is 138375673. The next prime is 138375683. The reversal of 138375679 is 976573831.

It is not a de Polignac number, because 138375679 - 2⁷ = 138375551 is a prime.

It is a super-2 number, since 2×138375679² = 38295657077422082, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138375673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 95442 + ... + 96880.

It is an arithmetic number, because the mean of its divisors is an integer number (12517200).

Almost surely, 2^138375679 is an apocalyptic number.

138375679 is a deficient number, since it is larger than the sum of its proper divisors (11830721).

138375679 is a wasteful number, since it uses less digits than its factorization.

138375679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2034 (or 2021 counting only the distinct ones).

The product of its digits is 952560, while the sum is 49.

The square root of 138375679 is about 11763.3192169557. The cubic root of 138375679 is about 517.2334320685.

The spelling of 138375679 in words is "one hundred thirty-eight million, three hundred seventy-five thousand, six hundred seventy-nine".