9985899 has 32 divisors (see below), whose sum is σ = 16773120. Its totient is φ = 5133600.

The previous prime is 9985891. The next prime is 9985901.

9985899 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 9985899 - 2³ = 9985891 is a prime.

It is not an unprimeable number, because it can be changed into a prime (9985891) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 31954 + ... + 32264.

It is an arithmetic number, because the mean of its divisors is an integer number (524160).

Almost surely, 2^9985899 is an apocalyptic number.

9985899 is a deficient number, since it is larger than the sum of its proper divisors (6787221).

9985899 is a wasteful number, since it uses less digits than its factorization.

9985899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 471.

The product of its digits is 2099520, while the sum is 57.

The square root of 9985899 is about 3160.0473097724. The cubic root of 9985899 is about 215.3421557558.

The spelling of 9985899 in words is "nine million, nine hundred eighty-five thousand, eight hundred ninety-nine".