99999863 has 8 divisors (see below), whose sum is σ = 103197360.
Its totient is φ = 96828480.
The previous prime is 99999847. The next prime is 99999931. The reversal of 99999863 is 36899999.
It is a sphenic number, since it is the product of 3 distinct primes.
It is a cyclic number.
It is not a de Polignac number, because 99999863 - 24 = 99999847 is a prime.
It is a Duffinian number.
It is a nialpdrome in base 10.
It is a junction number, because it is equal to n+sod(n) for n = 99999796 and 99999805.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (99999563) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (17) of ones.
It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1403 + ... + 14211.
It is an arithmetic number, because the mean of its divisors is an integer number (12899670).
Almost surely, 299999863 is an apocalyptic number.
99999863 is a deficient number, since it is larger than the sum of its proper divisors (3197497).
99999863 is a wasteful number, since it uses less digits than its factorization.
99999863 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 13057.
The product of its digits is 8503056, while the sum is 62.
The square root of 99999863 is about 9999.9931499977.
The cubic root of 99999863 is about 464.1586713953.
The spelling of 99999863 in words is "ninety-nine million, nine hundred ninety-nine thousand, eight hundred sixty-three".