99899 has 4 divisors (see below), whose sum is σ = 100536. Its totient is φ = 99264.

The previous prime is 99881. The next prime is 99901.

99899 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 99899 - 2⁸ = 99643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99809) 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, 107 + ... + 459.

It is an arithmetic number, because the mean of its divisors is an integer number (25134).

2⁹⁹⁸⁹⁹ is an apocalyptic number.

99899 is a deficient number, since it is larger than the sum of its proper divisors (637).

99899 is a wasteful number, since it uses less digits than its factorization.

99899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 636.

The product of its digits is 52488, while the sum is 44.

The square root of 99899 is about 316.0680306516. The cubic root of 99899 is about 46.4002563898.

The spelling of 99899 in words is "ninety-nine thousand, eight hundred ninety-nine".