138729888989 has 8 divisors (see below), whose sum is σ = 142136974392. Its totient is φ = 135323919360.

The previous prime is 138729888959. The next prime is 138729889043. The reversal of 138729888989 is 989888927831.

It can be written as a sum of positive squares in 4 ways, for example, as 748843225 + 137981045764 = 27365^2 + 371458^2 .

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 138729888989 - 2⁸ = 138729888733 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 (138729888959) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24404 + ... + 527309.

It is an arithmetic number, because the mean of its divisors is an integer number (17767121799).

Almost surely, 2^138729888989 is an apocalyptic number.

It is an amenable number.

138729888989 is a deficient number, since it is larger than the sum of its proper divisors (3407085403).

138729888989 is an equidigital number, since it uses as much as digits as its factorization.

138729888989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 557887.

The product of its digits is 1003290624, while the sum is 80.

The spelling of 138729888989 in words is "one hundred thirty-eight billion, seven hundred twenty-nine million, eight hundred eighty-eight thousand, nine hundred eighty-nine".