138943585 has 8 divisors (see below), whose sum is σ = 181889856. Its totient is φ = 101049840.

The previous prime is 138943583. The next prime is 138943589. The reversal of 138943585 is 585349831.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 138943585 - 2¹ = 138943583 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138943583) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1263069 + ... + 1263178.

It is an arithmetic number, because the mean of its divisors is an integer number (22736232).

Almost surely, 2^138943585 is an apocalyptic number.

It is an amenable number.

138943585 is a deficient number, since it is larger than the sum of its proper divisors (42946271).

138943585 is a wasteful number, since it uses less digits than its factorization.

138943585 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2526263.

The product of its digits is 518400, while the sum is 46.

The square root of 138943585 is about 11787.4333508190. The cubic root of 138943585 is about 517.9400568174.

The spelling of 138943585 in words is "one hundred thirty-eight million, nine hundred forty-three thousand, five hundred eighty-five".