138912934 has 8 divisors (see below), whose sum is σ = 210213720. Its totient is φ = 68841696.

The previous prime is 138912901. The next prime is 138912937. The reversal of 138912934 is 439219831.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138912937) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 307104 + ... + 307555.

It is an arithmetic number, because the mean of its divisors is an integer number (26276715).

Almost surely, 2^138912934 is an apocalyptic number.

138912934 is a deficient number, since it is larger than the sum of its proper divisors (71300786).

138912934 is a wasteful number, since it uses less digits than its factorization.

138912934 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 614774.

The product of its digits is 46656, while the sum is 40.

The square root of 138912934 is about 11786.1331232937. The cubic root of 138912934 is about 517.9019681015.

The spelling of 138912934 in words is "one hundred thirty-eight million, nine hundred twelve thousand, nine hundred thirty-four".