99711871 has 8 divisors (see below), whose sum is σ = 114032160. Its totient is φ = 85410528.

The previous prime is 99711847. The next prime is 99711893. The reversal of 99711871 is 17811799.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 99711871 - 2⁵ = 99711839 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99711071) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9345 + ... + 16933.

It is an arithmetic number, because the mean of its divisors is an integer number (14254020).

Almost surely, 2^99711871 is an apocalyptic number.

99711871 is a deficient number, since it is larger than the sum of its proper divisors (14320289).

99711871 is a wasteful number, since it uses less digits than its factorization.

99711871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9473.

The product of its digits is 31752, while the sum is 43.

The square root of 99711871 is about 9985.5831577330. The cubic root of 99711871 is about 463.7126624061.

The spelling of 99711871 in words is "ninety-nine million, seven hundred eleven thousand, eight hundred seventy-one".