99859000859 has 2 divisors, whose sum is σ = 99859000860. Its totient is φ = 99859000858.

The previous prime is 99859000789. The next prime is 99859000933. The reversal of 99859000859 is 95800095899.

It is a weak prime.

It is an emirp because it is prime and its reverse (95800095899) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99859000859 is a prime.

It is not a weakly prime, because it can be changed into another prime (99859060859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49929500429 + 49929500430.

It is an arithmetic number, because the mean of its divisors is an integer number (49929500430).

Almost surely, 2^99859000859 is an apocalyptic number.

99859000859 is a deficient number, since it is larger than the sum of its proper divisors (1).

99859000859 is an equidigital number, since it uses as much as digits as its factorization.

99859000859 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10497600, while the sum is 62.

It can be divided in two parts, 99 and 859000859, that added together give a palindrome (859000958).

The spelling of 99859000859 in words is "ninety-nine billion, eight hundred fifty-nine million, eight hundred fifty-nine", and thus it is an aban number.