138748911 has 16 divisors (see below), whose sum is σ = 212076288. Its totient is φ = 79041600.

The previous prime is 138748877. The next prime is 138748921. The reversal of 138748911 is 119847831.

138748911 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 138748911 - 2⁷ = 138748783 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138748921) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3030 + ... + 16931.

It is an arithmetic number, because the mean of its divisors is an integer number (13254768).

Almost surely, 2^138748911 is an apocalyptic number.

138748911 is a deficient number, since it is larger than the sum of its proper divisors (73327377).

138748911 is a wasteful number, since it uses less digits than its factorization.

138748911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20302.

The product of its digits is 48384, while the sum is 42.

The square root of 138748911 is about 11779.1727638234. The cubic root of 138748911 is about 517.6980483071.

The spelling of 138748911 in words is "one hundred thirty-eight million, seven hundred forty-eight thousand, nine hundred eleven".