11987663 has 4 divisors (see below), whose sum is σ = 11997768. Its totient is φ = 11977560.

The previous prime is 11987653. The next prime is 11987671. The reversal of 11987663 is 36678911.

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 11987663 - 2⁸ = 11987407 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11987663.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11987653) 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, 2993 + ... + 5738.

It is an arithmetic number, because the mean of its divisors is an integer number (2999442).

Almost surely, 2^11987663 is an apocalyptic number.

11987663 is a deficient number, since it is larger than the sum of its proper divisors (10105).

11987663 is an equidigital number, since it uses as much as digits as its factorization.

11987663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10104.

The product of its digits is 54432, while the sum is 41.

The square root of 11987663 is about 3462.3204646595. The cubic root of 11987663 is about 228.8643641661.

The spelling of 11987663 in words is "eleven million, nine hundred eighty-seven thousand, six hundred sixty-three".