11717689 has 4 divisors (see below), whose sum is σ = 11741220. Its totient is φ = 11694160.

The previous prime is 11717687. The next prime is 11717723. The reversal of 11717689 is 98671711.

11717689 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 5382400 + 6335289 = 2320^2 + 2517^2 .

It is a cyclic number.

It is not a de Polignac number, because 11717689 - 2¹ = 11717687 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11717681) 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, 11002 + ... + 12019.

It is an arithmetic number, because the mean of its divisors is an integer number (2935305).

Almost surely, 2^11717689 is an apocalyptic number.

It is an amenable number.

11717689 is a deficient number, since it is larger than the sum of its proper divisors (23531).

11717689 is an equidigital number, since it uses as much as digits as its factorization.

11717689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23530.

The product of its digits is 21168, while the sum is 40.

The square root of 11717689 is about 3423.1110119305. Note that the first 3 decimals coincide. The cubic root of 11717689 is about 227.1332189106.

The spelling of 11717689 in words is "eleven million, seven hundred seventeen thousand, six hundred eighty-nine".