138267423 has 12 divisors (see below), whose sum is σ = 228251088. Its totient is φ = 79009920.

The previous prime is 138267413. The next prime is 138267439. The reversal of 138267423 is 324762831.

It is a happy number.

It is not a de Polignac number, because 138267423 - 2⁹ = 138266911 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138267413) 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, 1097298 + ... + 1097423.

It is an arithmetic number, because the mean of its divisors is an integer number (19020924).

Almost surely, 2^138267423 is an apocalyptic number.

138267423 is a deficient number, since it is larger than the sum of its proper divisors (89983665).

138267423 is a wasteful number, since it uses less digits than its factorization.

138267423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2194734 (or 2194731 counting only the distinct ones).

The product of its digits is 48384, while the sum is 36.

The square root of 138267423 is about 11758.7168942874. The cubic root of 138267423 is about 517.0985137768.

The spelling of 138267423 in words is "one hundred thirty-eight million, two hundred sixty-seven thousand, four hundred twenty-three".