11979664 has 10 divisors (see below), whose sum is σ = 23210630. Its totient is φ = 5989824.

The previous prime is 11979659. The next prime is 11979719. The reversal of 11979664 is 46697911.

It is a happy number.

11979664 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 8952064 + 3027600 = 2992^2 + 1740^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 11979664.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 374349 + ... + 374380.

It is an arithmetic number, because the mean of its divisors is an integer number (2321063).

Almost surely, 2^11979664 is an apocalyptic number.

It is an amenable number.

11979664 is a deficient number, since it is larger than the sum of its proper divisors (11230966).

11979664 is an equidigital number, since it uses as much as digits as its factorization.

11979664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 748737 (or 748731 counting only the distinct ones).

The product of its digits is 81648, while the sum is 43.

The square root of 11979664 is about 3461.1651217473. The cubic root of 11979664 is about 228.8134481150.

The spelling of 11979664 in words is "eleven million, nine hundred seventy-nine thousand, six hundred sixty-four".