9681885 has 12 divisors (see below), whose sum is σ = 16782012. Its totient is φ = 5163648.

The previous prime is 9681883. The next prime is 9681899. The reversal of 9681885 is 5881869.

It can be written as a sum of positive squares in 2 ways, for example, as 7257636 + 2424249 = 2694^2 + 1557^2 .

It is not a de Polignac number, because 9681885 - 2¹ = 9681883 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 215153 = 9681885 / (9 + 6 + 8 + 1 + 8 + 8 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 9681885.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9681883) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 107532 + ... + 107621.

It is an arithmetic number, because the mean of its divisors is an integer number (1398501).

Almost surely, 2^9681885 is an apocalyptic number.

It is an amenable number.

9681885 is a deficient number, since it is larger than the sum of its proper divisors (7100127).

9681885 is a wasteful number, since it uses less digits than its factorization.

9681885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215164 (or 215161 counting only the distinct ones).

The product of its digits is 138240, while the sum is 45.

The square root of 9681885 is about 3111.5727534480. The cubic root of 9681885 is about 213.1342802035.

The spelling of 9681885 in words is "nine million, six hundred eighty-one thousand, eight hundred eighty-five".