138536667 has 12 divisors (see below), whose sum is σ = 200247840. Its totient is φ = 92293488.

The previous prime is 138536641. The next prime is 138536701. The reversal of 138536667 is 766635831.

138536667 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 138536667 - 2⁶ = 138536603 is a prime.

It is not an unprimeable number, because it can be changed into a prime (138536767) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10878 + ... + 19884.

It is an arithmetic number, because the mean of its divisors is an integer number (16687320).

Almost surely, 2^138536667 is an apocalyptic number.

138536667 is a deficient number, since it is larger than the sum of its proper divisors (61711173).

138536667 is a wasteful number, since it uses less digits than its factorization.

138536667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10722 (or 10719 counting only the distinct ones).

The product of its digits is 544320, while the sum is 45.

The square root of 138536667 is about 11770.1600244007. The cubic root of 138536667 is about 517.4339396177.

The spelling of 138536667 in words is "one hundred thirty-eight million, five hundred thirty-six thousand, six hundred sixty-seven".