11047909 has 4 divisors (see below), whose sum is σ = 11697804. Its totient is φ = 10398016.

The previous prime is 11047891. The next prime is 11047919. The reversal of 11047909 is 90974011.

11047909 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 7717284 + 3330625 = 2778^2 + 1825^2 .

It is not a de Polignac number, because 11047909 - 2⁵ = 11047877 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 (11047919) 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, 324922 + ... + 324955.

It is an arithmetic number, because the mean of its divisors is an integer number (2924451).

Almost surely, 2^11047909 is an apocalyptic number.

It is an amenable number.

11047909 is a deficient number, since it is larger than the sum of its proper divisors (649895).

11047909 is an equidigital number, since it uses as much as digits as its factorization.

11047909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 649894.

The product of its (nonzero) digits is 2268, while the sum is 31.

The square root of 11047909 is about 3323.8394967266. The cubic root of 11047909 is about 222.7204161760.

The spelling of 11047909 in words is "eleven million, forty-seven thousand, nine hundred nine".