99859171 has 2 divisors, whose sum is σ = 99859172. Its totient is φ = 99859170.

The previous prime is 99859159. The next prime is 99859213. The reversal of 99859171 is 17195899.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 99859171 - 2⁹ = 99858659 is a prime.

It is not a weakly prime, because it can be changed into another prime (99856171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49929585 + 49929586.

It is an arithmetic number, because the mean of its divisors is an integer number (49929586).

Almost surely, 2^99859171 is an apocalyptic number.

99859171 is a deficient number, since it is larger than the sum of its proper divisors (1).

99859171 is an equidigital number, since it uses as much as digits as its factorization.

99859171 is an evil number, because the sum of its binary digits is even.

The product of its digits is 204120, while the sum is 49.

The square root of 99859171 is about 9992.9560691519. The cubic root of 99859171 is about 463.9408908924.

The spelling of 99859171 in words is "ninety-nine million, eight hundred fifty-nine thousand, one hundred seventy-one".