138584727 has 12 divisors (see below), whose sum is σ = 210713880. Its totient is φ = 87527088.

The previous prime is 138584701. The next prime is 138584737. The reversal of 138584727 is 727485831.

It is not a de Polignac number, because 138584727 - 2⁸ = 138584471 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138584737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 405048 + ... + 405389.

It is an arithmetic number, because the mean of its divisors is an integer number (17559490).

Almost surely, 2^138584727 is an apocalyptic number.

138584727 is a deficient number, since it is larger than the sum of its proper divisors (72129153).

138584727 is a wasteful number, since it uses less digits than its factorization.

138584727 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 810462 (or 810459 counting only the distinct ones).

The product of its digits is 376320, while the sum is 45.

The square root of 138584727 is about 11772.2014508757. The cubic root of 138584727 is about 517.4937673407.

The spelling of 138584727 in words is "one hundred thirty-eight million, five hundred eighty-four thousand, seven hundred twenty-seven".