9866841 has 4 divisors (see below), whose sum is σ = 13155792. Its totient is φ = 6577892.

The previous prime is 9866819. The next prime is 9866849. The reversal of 9866841 is 1486689.

9866841 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1486689 = 3 ⋅495563.

It is a cyclic number.

It is not a de Polignac number, because 9866841 - 2⁵ = 9866809 is a prime.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 9866793 and 9866802.

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

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1644471 + ... + 1644476.

It is an arithmetic number, because the mean of its divisors is an integer number (3288948).

Almost surely, 2^9866841 is an apocalyptic number.

It is an amenable number.

9866841 is a deficient number, since it is larger than the sum of its proper divisors (3288951).

9866841 is a wasteful number, since it uses less digits than its factorization.

9866841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3288950.

The product of its digits is 82944, while the sum is 42.

The square root of 9866841 is about 3141.1528138567. The cubic root of 9866841 is about 214.4829182066.

The spelling of 9866841 in words is "nine million, eight hundred sixty-six thousand, eight hundred forty-one".