11689663 has 4 divisors (see below), whose sum is σ = 11697840. Its totient is φ = 11681488.

The previous prime is 11689661. The next prime is 11689673. The reversal of 11689663 is 36698611.

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 is a cyclic number.

It is not a de Polignac number, because 11689663 - 2¹ = 11689661 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11689661) 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, 1318 + ... + 5011.

It is an arithmetic number, because the mean of its divisors is an integer number (2924460).

Almost surely, 2^11689663 is an apocalyptic number.

11689663 is a deficient number, since it is larger than the sum of its proper divisors (8177).

11689663 is an equidigital number, since it uses as much as digits as its factorization.

11689663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8176.

The product of its digits is 46656, while the sum is 40.

The square root of 11689663 is about 3419.0149166098. The cubic root of 11689663 is about 226.9519909856.

The spelling of 11689663 in words is "eleven million, six hundred eighty-nine thousand, six hundred sixty-three".