138347170923 has 32 divisors (see below), whose sum is σ = 199651608576. Its totient is φ = 84708891648.

The previous prime is 138347170921. The next prime is 138347170939. The reversal of 138347170923 is 329071743831.

It is not a de Polignac number, because 138347170923 - 2¹ = 138347170921 is a prime.

It is not an unprimeable number, because it can be changed into a prime (138347170921) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 23104936 + ... + 23110922.

It is an arithmetic number, because the mean of its divisors is an integer number (6239112768).

Almost surely, 2^138347170923 is an apocalyptic number.

138347170923 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

138347170923 is a deficient number, since it is larger than the sum of its proper divisors (61304437653).

138347170923 is a wasteful number, since it uses less digits than its factorization.

138347170923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8883.

The product of its (nonzero) digits is 762048, while the sum is 48.

The spelling of 138347170923 in words is "one hundred thirty-eight billion, three hundred forty-seven million, one hundred seventy thousand, nine hundred twenty-three".