9985689 has 24 divisors (see below), whose sum is σ = 17019392. Its totient is φ = 5520960.

The previous prime is 9985669. The next prime is 9985693. The reversal of 9985689 is 9865899.

9985689 is digitally balanced in base 2 and base 8, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 9985689 - 2⁸ = 9985433 is a prime.

It is a Duffinian number.

9985689 is strictly pandigital in base 8.

It is not an unprimeable number, because it can be changed into a prime (9985649) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 604 + ... + 4509.

Almost surely, 2^9985689 is an apocalyptic number.

It is an amenable number.

9985689 is a deficient number, since it is larger than the sum of its proper divisors (7033703).

9985689 is a wasteful number, since it uses less digits than its factorization.

9985689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5157 (or 5154 counting only the distinct ones).

The product of its digits is 1399680, while the sum is 54.

The square root of 9985689 is about 3160.0140822471. The cubic root of 9985689 is about 215.3406462215.

The spelling of 9985689 in words is "nine million, nine hundred eighty-five thousand, six hundred eighty-nine".