985899959 has 16 divisors (see below), whose sum is σ = 1084648320. Its totient is φ = 888704160.

The previous prime is 985899931. The next prime is 985899961. The reversal of 985899959 is 959998589.

It is a cyclic number.

It is not a de Polignac number, because 985899959 - 2⁸ = 985899703 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 985899892 and 985899901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (985899359) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1155377 + ... + 1156229.

It is an arithmetic number, because the mean of its divisors is an integer number (67790520).

Almost surely, 2^985899959 is an apocalyptic number.

985899959 is a deficient number, since it is larger than the sum of its proper divisors (98748361).

985899959 is a wasteful number, since it uses less digits than its factorization.

985899959 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1630.

The product of its digits is 94478400, while the sum is 71.

The square root of 985899959 is about 31399.0439185654. The cubic root of 985899959 is about 995.2777215214.

The spelling of 985899959 in words is "nine hundred eighty-five million, eight hundred ninety-nine thousand, nine hundred fifty-nine".