138855429 has 12 divisors (see below), whose sum is σ = 200680896. Its totient is φ = 92518632.

The previous prime is 138855421. The next prime is 138855449. The reversal of 138855429 is 924558831.

138855429 is a `hidden beast` number, since 13 + 88 + 554 + 2 + 9 = 666.

It is not a de Polignac number, because 138855429 - 2³ = 138855421 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138855421) 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, 19854 + ... + 25920.

It is an arithmetic number, because the mean of its divisors is an integer number (16723408).

Almost surely, 2^138855429 is an apocalyptic number.

It is an amenable number.

138855429 is a deficient number, since it is larger than the sum of its proper divisors (61825467).

138855429 is a wasteful number, since it uses less digits than its factorization.

138855429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8616 (or 8613 counting only the distinct ones).

The product of its digits is 345600, while the sum is 45.

The square root of 138855429 is about 11783.6933514073. The cubic root of 138855429 is about 517.8304939238.

The spelling of 138855429 in words is "one hundred thirty-eight million, eight hundred fifty-five thousand, four hundred twenty-nine".