10809749 has 4 divisors (see below), whose sum is σ = 10987020. Its totient is φ = 10632480.

The previous prime is 10809709. The next prime is 10809769. The reversal of 10809749 is 94790801.

10809749 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.

It can be written as a sum of positive squares in 2 ways, for example, as 2829124 + 7980625 = 1682^2 + 2825^2 .

It is a cyclic number.

It is not a de Polignac number, because 10809749 - 2⁸ = 10809493 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 (10809709) 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, 88544 + ... + 88665.

It is an arithmetic number, because the mean of its divisors is an integer number (2746755).

Almost surely, 2^10809749 is an apocalyptic number.

It is an amenable number.

10809749 is a deficient number, since it is larger than the sum of its proper divisors (177271).

10809749 is an equidigital number, since it uses as much as digits as its factorization.

10809749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177270.

The product of its (nonzero) digits is 18144, while the sum is 38.

The square root of 10809749 is about 3287.8182735668. The cubic root of 10809749 is about 221.1083803289.

The spelling of 10809749 in words is "ten million, eight hundred nine thousand, seven hundred forty-nine".