99908171 has 4 divisors (see below), whose sum is σ = 108990744. Its totient is φ = 90825600.

The previous prime is 99908143. The next prime is 99908197. The reversal of 99908171 is 17180999.

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 99908171 - 2²² = 95713867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99908111) 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, 4541270 + ... + 4541291.

It is an arithmetic number, because the mean of its divisors is an integer number (27247686).

Almost surely, 2^99908171 is an apocalyptic number.

99908171 is a deficient number, since it is larger than the sum of its proper divisors (9082573).

99908171 is a wasteful number, since it uses less digits than its factorization.

99908171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9082572.

The product of its (nonzero) digits is 40824, while the sum is 44.

The square root of 99908171 is about 9995.4074954451. The cubic root of 99908171 is about 464.0167623626.

The spelling of 99908171 in words is "ninety-nine million, nine hundred eight thousand, one hundred seventy-one".