138397289237 has 4 divisors (see below), whose sum is σ = 138411960960. Its totient is φ = 138382617516.

The previous prime is 138397289227. The next prime is 138397289279. The reversal of 138397289237 is 732982793831.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-138397289237 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 138397289237.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138397289227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7321703 + ... + 7340580.

It is an arithmetic number, because the mean of its divisors is an integer number (34602990240).

Almost surely, 2^138397289237 is an apocalyptic number.

It is an amenable number.

138397289237 is a deficient number, since it is larger than the sum of its proper divisors (14671723).

138397289237 is an equidigital number, since it uses as much as digits as its factorization.

138397289237 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14671722.

The product of its digits is 27433728, while the sum is 62.

The spelling of 138397289237 in words is "one hundred thirty-eight billion, three hundred ninety-seven million, two hundred eighty-nine thousand, two hundred thirty-seven".