11665873 has 4 divisors (see below), whose sum is σ = 11673508. Its totient is φ = 11658240.

The previous prime is 11665861. The next prime is 11665879. The reversal of 11665873 is 37856611.

11665873 is digitally balanced in base 3, 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 brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 986049 + 10679824 = 993^2 + 3268^2 .

It is a cyclic number.

It is not a de Polignac number, because 11665873 - 2¹⁷ = 11534801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11665879) 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, 648 + ... + 4873.

It is an arithmetic number, because the mean of its divisors is an integer number (2918377).

Almost surely, 2^11665873 is an apocalyptic number.

It is an amenable number.

11665873 is a deficient number, since it is larger than the sum of its proper divisors (7635).

11665873 is an equidigital number, since it uses as much as digits as its factorization.

11665873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7634.

The product of its digits is 30240, while the sum is 37.

The square root of 11665873 is about 3415.5340724402. The cubic root of 11665873 is about 226.7979273855.

The spelling of 11665873 in words is "eleven million, six hundred sixty-five thousand, eight hundred seventy-three".