138813695 has 4 divisors (see below), whose sum is σ = 166576440. Its totient is φ = 111050952.

The previous prime is 138813673. The next prime is 138813799. The reversal of 138813695 is 596318831.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-138813695 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13881365 + ... + 13881374.

It is an arithmetic number, because the mean of its divisors is an integer number (41644110).

Almost surely, 2^138813695 is an apocalyptic number.

138813695 is a deficient number, since it is larger than the sum of its proper divisors (27762745).

138813695 is an equidigital number, since it uses as much as digits as its factorization.

138813695 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27762744.

The product of its digits is 155520, while the sum is 44.

The square root of 138813695 is about 11781.9223813434. The cubic root of 138813695 is about 517.7786094963.

It can be divided in two parts, 13881 and 3695, that added together give a cube (17576 = 26³).

The spelling of 138813695 in words is "one hundred thirty-eight million, eight hundred thirteen thousand, six hundred ninety-five".