138019534 has 16 divisors (see below), whose sum is σ = 218509200. Its totient is φ = 65202624.

The previous prime is 138019529. The next prime is 138019547. The reversal of 138019534 is 435910831.

It is a self number, because there is not a number n which added to its sum of digits gives 138019534.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10114 + ... + 19450.

It is an arithmetic number, because the mean of its divisors is an integer number (13656825).

Almost surely, 2^138019534 is an apocalyptic number.

138019534 is a deficient number, since it is larger than the sum of its proper divisors (80489666).

138019534 is a wasteful number, since it uses less digits than its factorization.

138019534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9747.

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 138019534 is about 11748.1715173043. The cubic root of 138019534 is about 516.7893069025.

The spelling of 138019534 in words is "one hundred thirty-eight million, nineteen thousand, five hundred thirty-four".