138000691279 has 8 divisors (see below), whose sum is σ = 154218067920. Its totient is φ = 122395291200.

The previous prime is 138000691211. The next prime is 138000691327. The reversal of 138000691279 is 972196000831.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 138000691279 - 2⁷ = 138000691151 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138000691079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 152993664 + ... + 152994565.

It is an arithmetic number, because the mean of its divisors is an integer number (19277258490).

Almost surely, 2^138000691279 is an apocalyptic number.

138000691279 is a deficient number, since it is larger than the sum of its proper divisors (16217376641).

138000691279 is a wasteful number, since it uses less digits than its factorization.

138000691279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305988281.

The product of its (nonzero) digits is 163296, while the sum is 46.

The spelling of 138000691279 in words is "one hundred thirty-eight billion, six hundred ninety-one thousand, two hundred seventy-nine".