9916985 has 16 divisors (see below), whose sum is σ = 13260240. Its totient is φ = 7069440.

The previous prime is 9916981. The next prime is 9917009. The reversal of 9916985 is 5896199.

9916985 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 157609 + 9759376 = 397^2 + 3124^2 .

It is not a de Polignac number, because 9916985 - 2² = 9916981 is a prime.

It is not an unprimeable number, because it can be changed into a prime (9916981) 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, 746 + ... + 4515.

It is an arithmetic number, because the mean of its divisors is an integer number (828765).

Almost surely, 2^9916985 is an apocalyptic number.

It is an amenable number.

9916985 is a deficient number, since it is larger than the sum of its proper divisors (3343255).

9916985 is a wasteful number, since it uses less digits than its factorization.

9916985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5308.

The product of its digits is 174960, while the sum is 47.

The square root of 9916985 is about 3149.1244815028. The cubic root of 9916985 is about 214.8456436704.

It can be divided in two parts, 9916 and 985, that added together give a palindrome (10901).

The spelling of 9916985 in words is "nine million, nine hundred sixteen thousand, nine hundred eighty-five".