138804105 has 16 divisors (see below), whose sum is σ = 242276544. Its totient is φ = 67298880.

The previous prime is 138804091. The next prime is 138804109. The reversal of 138804105 is 501408831.

138804105 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 138804105 - 2¹¹ = 138802057 is a prime.

It is not an unprimeable number, because it can be changed into a prime (138804109) 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, 420454 + ... + 420783.

It is an arithmetic number, because the mean of its divisors is an integer number (15142284).

Almost surely, 2^138804105 is an apocalyptic number.

138804105 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

138804105 is a deficient number, since it is larger than the sum of its proper divisors (103472439).

138804105 is a wasteful number, since it uses less digits than its factorization.

138804105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 841256.

The product of its (nonzero) digits is 3840, while the sum is 30.

The square root of 138804105 is about 11781.5153948887. The cubic root of 138804105 is about 517.7666855738.

The spelling of 138804105 in words is "one hundred thirty-eight million, eight hundred four thousand, one hundred five".