11811863 has 8 divisors (see below), whose sum is σ = 14209920. Its totient is φ = 9591480.

The previous prime is 11811853. The next prime is 11811869. The reversal of 11811863 is 36811811.

11811863 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11811863 - 2⁴ = 11811847 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 (11811869) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44273 + ... + 44538.

It is an arithmetic number, because the mean of its divisors is an integer number (1776240).

Almost surely, 2^11811863 is an apocalyptic number.

11811863 is a deficient number, since it is larger than the sum of its proper divisors (2398057).

11811863 is an equidigital number, since it uses as much as digits as its factorization.

11811863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88837.

The product of its digits is 1152, while the sum is 29.

The square root of 11811863 is about 3436.8391001035. The cubic root of 11811863 is about 227.7400790453.

The spelling of 11811863 in words is "eleven million, eight hundred eleven thousand, eight hundred sixty-three".