138568911 has 8 divisors (see below), whose sum is σ = 198970800. Its totient is φ = 85273152.

The previous prime is 138568909. The next prime is 138568939. The reversal of 138568911 is 119865831.

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

It is not a de Polignac number, because 138568911 - 2¹ = 138568909 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138568211) 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, 1776486 + ... + 1776563.

It is an arithmetic number, because the mean of its divisors is an integer number (24871350).

Almost surely, 2^138568911 is an apocalyptic number.

138568911 is a deficient number, since it is larger than the sum of its proper divisors (60401889).

138568911 is a wasteful number, since it uses less digits than its factorization.

138568911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3553065.

The product of its digits is 51840, while the sum is 42.

The square root of 138568911 is about 11771.5296796975. The cubic root of 138568911 is about 517.4740802440.

The spelling of 138568911 in words is "one hundred thirty-eight million, five hundred sixty-eight thousand, nine hundred eleven".