138334239 has 6 divisors (see below), whose sum is σ = 199816136. Its totient is φ = 92222820.

The previous prime is 138334237. The next prime is 138334247. The reversal of 138334239 is 932433831.

138334239 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 138334239 - 2¹ = 138334237 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 (138334237) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7685227 + ... + 7685244.

Almost surely, 2^138334239 is an apocalyptic number.

138334239 is a deficient number, since it is larger than the sum of its proper divisors (61481897).

138334239 is a wasteful number, since it uses less digits than its factorization.

138334239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15370477 (or 15370474 counting only the distinct ones).

The product of its digits is 46656, while the sum is 36.

The square root of 138334239 is about 11761.5576774507. The cubic root of 138334239 is about 517.1817941564.

The spelling of 138334239 in words is "one hundred thirty-eight million, three hundred thirty-four thousand, two hundred thirty-nine".