138113805 has 16 divisors (see below), whose sum is σ = 228602880. Its totient is φ = 71120448.

The previous prime is 138113803. The next prime is 138113861. The reversal of 138113805 is 508311831.

138113805 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 138113805 - 2¹ = 138113803 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138113803) 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, 158317 + ... + 159186.

It is an arithmetic number, because the mean of its divisors is an integer number (14287680).

Almost surely, 2^138113805 is an apocalyptic number.

138113805 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

138113805 is a deficient number, since it is larger than the sum of its proper divisors (90489075).

138113805 is a wasteful number, since it uses less digits than its factorization.

138113805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317540.

The product of its (nonzero) digits is 2880, while the sum is 30.

The square root of 138113805 is about 11752.1829887047. The cubic root of 138113805 is about 516.9069403891.

The spelling of 138113805 in words is "one hundred thirty-eight million, one hundred thirteen thousand, eight hundred five".