99512871 has 4 divisors (see below), whose sum is σ = 132683832. Its totient is φ = 66341912.

The previous prime is 99512867. The next prime is 99512911. The reversal of 99512871 is 17821599.

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 99512871 - 2² = 99512867 is a prime.

It is a super-2 number, since 2×99512871² = 19805622989325282, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99512801) 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, 16585476 + ... + 16585481.

It is an arithmetic number, because the mean of its divisors is an integer number (33170958).

Almost surely, 2^99512871 is an apocalyptic number.

99512871 is a deficient number, since it is larger than the sum of its proper divisors (33170961).

99512871 is a wasteful number, since it uses less digits than its factorization.

99512871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33170960.

The product of its digits is 45360, while the sum is 42.

The square root of 99512871 is about 9975.6138157008. The cubic root of 99512871 is about 463.4039720582.

The spelling of 99512871 in words is "ninety-nine million, five hundred twelve thousand, eight hundred seventy-one".