9138171863 has 4 divisors (see below), whose sum is σ = 9151552008. Its totient is φ = 9124791720.

The previous prime is 9138171841. The next prime is 9138171877. The reversal of 9138171863 is 3681718319.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 9138171863 - 2²⁰ = 9137123287 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 (9138171803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6689048 + ... + 6690413.

It is an arithmetic number, because the mean of its divisors is an integer number (2287888002).

Almost surely, 2^9138171863 is an apocalyptic number.

9138171863 is a deficient number, since it is larger than the sum of its proper divisors (13380145).

9138171863 is a wasteful number, since it uses less digits than its factorization.

9138171863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13380144.

The product of its digits is 217728, while the sum is 47.

The square root of 9138171863 is about 95593.7856923765. The cubic root of 9138171863 is about 2090.6745884486.

The spelling of 9138171863 in words is "nine billion, one hundred thirty-eight million, one hundred seventy-one thousand, eight hundred sixty-three".