99609171 has 16 divisors (see below), whose sum is σ = 145476000. Its totient is φ = 60343808.

The previous prime is 99609163. The next prime is 99609173. The reversal of 99609171 is 17190699.

It is a cyclic number.

It is not a de Polignac number, because 99609171 - 2³ = 99609163 is a prime.

It is not an unprimeable number, because it can be changed into a prime (99609173) 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, 32196 + ... + 35153.

It is an arithmetic number, because the mean of its divisors is an integer number (9092250).

Almost surely, 2^99609171 is an apocalyptic number.

99609171 is a deficient number, since it is larger than the sum of its proper divisors (45866829).

99609171 is a wasteful number, since it uses less digits than its factorization.

99609171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67398.

The product of its (nonzero) digits is 30618, while the sum is 42.

The square root of 99609171 is about 9980.4394191839. The cubic root of 99609171 is about 463.5534047054.

The spelling of 99609171 in words is "ninety-nine million, six hundred nine thousand, one hundred seventy-one".