99171171 has 24 divisors (see below), whose sum is σ = 156602160. Its totient is φ = 59976000.

The previous prime is 99171161. The next prime is 99171221. The reversal of 99171171 is 17117199.

It is not a de Polignac number, because 99171171 - 2¹³ = 99162979 is a prime.

It is a super-2 number, since 2×99171171² = 19669842315022482, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (99171161) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 68685 + ... + 70113.

It is an arithmetic number, because the mean of its divisors is an integer number (6525090).

Almost surely, 2^99171171 is an apocalyptic number.

99171171 is a deficient number, since it is larger than the sum of its proper divisors (57430989).

99171171 is a wasteful number, since it uses less digits than its factorization.

99171171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2147 (or 2144 counting only the distinct ones).

The product of its digits is 3969, while the sum is 36.

The square root of 99171171 is about 9958.4723226005. The cubic root of 99171171 is about 462.8729629530.

The spelling of 99171171 in words is "ninety-nine million, one hundred seventy-one thousand, one hundred seventy-one".