138816013 has 8 divisors (see below), whose sum is σ = 158768640. Its totient is φ = 118893840.

The previous prime is 138816001. The next prime is 138816079. The reversal of 138816013 is 310618831.

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

It is a cyclic number.

It is not a de Polignac number, because 138816013 - 2²¹ = 136718861 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138813013) 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, 3183 + ... + 16963.

It is an arithmetic number, because the mean of its divisors is an integer number (19846080).

Almost surely, 2^138816013 is an apocalyptic number.

It is an amenable number.

138816013 is a deficient number, since it is larger than the sum of its proper divisors (19952627).

138816013 is a wasteful number, since it uses less digits than its factorization.

138816013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15227.

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 138816013 is about 11782.0207519763. The cubic root of 138816013 is about 517.7814915466.

The spelling of 138816013 in words is "one hundred thirty-eight million, eight hundred sixteen thousand, thirteen".