99868 has 6 divisors (see below), whose sum is σ = 174776. Its totient is φ = 49932.

The previous prime is 99859. The next prime is 99871. The reversal of 99868 is 86899.

It is a happy number.

It is a zygodrome in base 2.

It is a self number, because there is not a number n which added to its sum of digits gives 99868.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12480 + ... + 12487.

2⁹⁹⁸⁶⁸ is an apocalyptic number.

It is an amenable number.

99868 is a deficient number, since it is larger than the sum of its proper divisors (74908).

99868 is a wasteful number, since it uses less digits than its factorization.

99868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24971 (or 24969 counting only the distinct ones).

The product of its digits is 31104, while the sum is 40.

The square root of 99868 is about 316.0189867714. The cubic root of 99868 is about 46.3954563525.

The spelling of 99868 in words is "ninety-nine thousand, eight hundred sixty-eight".