11979663 has 4 divisors (see below), whose sum is σ = 15972888. Its totient is φ = 7986440.

The previous prime is 11979659. The next prime is 11979719. The reversal of 11979663 is 36697911.

11979663 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.

It is a cyclic number.

It is not a de Polignac number, because 11979663 - 2² = 11979659 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11979263) 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, 1996608 + ... + 1996613.

It is an arithmetic number, because the mean of its divisors is an integer number (3993222).

Almost surely, 2^11979663 is an apocalyptic number.

11979663 is a deficient number, since it is larger than the sum of its proper divisors (3993225).

11979663 is an equidigital number, since it uses as much as digits as its factorization.

11979663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3993224.

The product of its digits is 61236, while the sum is 42.

The square root of 11979663 is about 3461.1649772873. The cubic root of 11979663 is about 228.8134417482.

The spelling of 11979663 in words is "eleven million, nine hundred seventy-nine thousand, six hundred sixty-three".