99399171 has 16 divisors (see below), whose sum is σ = 134244000. Its totient is φ = 65415168.

The previous prime is 99399163. The next prime is 99399259. The reversal of 99399171 is 17199399.

It is not a de Polignac number, because 99399171 - 2³ = 99399163 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 99399171.

It is not an unprimeable number, because it can be changed into a prime (99399071) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 146485 + ... + 147161.

It is an arithmetic number, because the mean of its divisors is an integer number (8390250).

Almost surely, 2^99399171 is an apocalyptic number.

99399171 is a deficient number, since it is larger than the sum of its proper divisors (34844829).

99399171 is a wasteful number, since it uses less digits than its factorization.

99399171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1238.

The product of its digits is 137781, while the sum is 48.

The square root of 99399171 is about 9969.9132894925. The cubic root of 99399171 is about 463.2274149598.

It can be divided in two parts, 9939 and 9171, that added together give a triangular number (19110 = T₁₉₅).

The spelling of 99399171 in words is "ninety-nine million, three hundred ninety-nine thousand, one hundred seventy-one".