138813717 has 24 divisors (see below), whose sum is σ = 224669376. Its totient is φ = 75871488.

The previous prime is 138813673. The next prime is 138813799. The reversal of 138813717 is 717318831.

It is not a de Polignac number, because 138813717 - 2⁸ = 138813461 is a prime.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138813217) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17148 + ... + 23909.

It is an arithmetic number, because the mean of its divisors is an integer number (9361224).

Almost surely, 2^138813717 is an apocalyptic number.

It is an amenable number.

138813717 is a deficient number, since it is larger than the sum of its proper divisors (85855659).

138813717 is a wasteful number, since it uses less digits than its factorization.

138813717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41097 (or 41090 counting only the distinct ones).

The product of its digits is 28224, while the sum is 39.

The square root of 138813717 is about 11781.9233149771. The cubic root of 138813717 is about 517.7786368498.

The spelling of 138813717 in words is "one hundred thirty-eight million, eight hundred thirteen thousand, seven hundred seventeen".