9866845 has 4 divisors (see below), whose sum is σ = 11840220. Its totient is φ = 7893472.

The previous prime is 9866819. The next prime is 9866849. The reversal of 9866845 is 5486689.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5692996 + 4173849 = 2386^2 + 2043^2 .

It is a cyclic number.

It is not a de Polignac number, because 9866845 - 2²¹ = 7769693 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 9866795 and 9866804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9866849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 986680 + ... + 986689.

It is an arithmetic number, because the mean of its divisors is an integer number (2960055).

Almost surely, 2^9866845 is an apocalyptic number.

It is an amenable number.

9866845 is a deficient number, since it is larger than the sum of its proper divisors (1973375).

9866845 is a wasteful number, since it uses less digits than its factorization.

9866845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1973374.

The product of its digits is 414720, while the sum is 46.

The square root of 9866845 is about 3141.1534505656. The cubic root of 9866845 is about 214.4829471902.

It can be divided in two parts, 986684 and 5, that added together give a palindrome (986689).

The spelling of 9866845 in words is "nine million, eight hundred sixty-six thousand, eight hundred forty-five".