10809839 has 4 divisors (see below), whose sum is σ = 11279856. Its totient is φ = 10339824.

The previous prime is 10809829. The next prime is 10809853. The reversal of 10809839 is 93890801.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93890801 = 43 ⋅2183507.

It is a cyclic number.

It is not a de Polignac number, because 10809839 - 2⁴ = 10809823 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10809829) 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, 234974 + ... + 235019.

It is an arithmetic number, because the mean of its divisors is an integer number (2819964).

Almost surely, 2^10809839 is an apocalyptic number.

10809839 is a deficient number, since it is larger than the sum of its proper divisors (470017).

10809839 is an equidigital number, since it uses as much as digits as its factorization.

10809839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 470016.

The product of its (nonzero) digits is 15552, while the sum is 38.

The square root of 10809839 is about 3287.8319604262. The cubic root of 10809839 is about 221.1089939632.

The spelling of 10809839 in words is "ten million, eight hundred nine thousand, eight hundred thirty-nine".