138679534 has 16 divisors (see below), whose sum is σ = 239068800. Its totient is φ = 59100984.

The previous prime is 138679517. The next prime is 138679547. The reversal of 138679534 is 435976831.

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, 25164 + ... + 30175.

It is an arithmetic number, because the mean of its divisors is an integer number (14941800).

Almost surely, 2^138679534 is an apocalyptic number.

138679534 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

138679534 is a deficient number, since it is larger than the sum of its proper divisors (100389266).

138679534 is a wasteful number, since it uses less digits than its factorization.

138679534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55527.

The product of its digits is 544320, while the sum is 46.

The square root of 138679534 is about 11776.2274944058. The cubic root of 138679534 is about 517.6117477488.

The spelling of 138679534 in words is "one hundred thirty-eight million, six hundred seventy-nine thousand, five hundred thirty-four".