99859813 has 8 divisors (see below), whose sum is σ = 104579136. Its totient is φ = 95172000.

The previous prime is 99859807. The next prime is 99859841. The reversal of 99859813 is 31895899.

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 99859813 - 2²¹ = 97762661 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 (99859843) 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, 1263 + ... + 14188.

It is an arithmetic number, because the mean of its divisors is an integer number (13072392).

Almost surely, 2^99859813 is an apocalyptic number.

It is an amenable number.

99859813 is a deficient number, since it is larger than the sum of its proper divisors (4719323).

99859813 is a wasteful number, since it uses less digits than its factorization.

99859813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15755.

The product of its digits is 699840, while the sum is 52.

The square root of 99859813 is about 9992.9881917272. The cubic root of 99859813 is about 463.9418851240.

The spelling of 99859813 in words is "ninety-nine million, eight hundred fifty-nine thousand, eight hundred thirteen".