138276173 has 4 divisors (see below), whose sum is σ = 158029920. Its totient is φ = 118522428.

The previous prime is 138276157. The next prime is 138276191. The reversal of 138276173 is 371672831.

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 not a de Polignac number, because 138276173 - 2⁴ = 138276157 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 (138276473) 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, 9876863 + ... + 9876876.

It is an arithmetic number, because the mean of its divisors is an integer number (39507480).

Almost surely, 2^138276173 is an apocalyptic number.

It is an amenable number.

138276173 is a deficient number, since it is larger than the sum of its proper divisors (19753747).

138276173 is an equidigital number, since it uses as much as digits as its factorization.

138276173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19753746.

The product of its digits is 42336, while the sum is 38.

The square root of 138276173 is about 11759.0889528058. The cubic root of 138276173 is about 517.1094214234.

The spelling of 138276173 in words is "one hundred thirty-eight million, two hundred seventy-six thousand, one hundred seventy-three".