11979 has 12 divisors (see below), whose sum is σ = 19032. Its totient is φ = 7260.

The previous prime is 11971. The next prime is 11981. The reversal of 11979 is 97911.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

11979 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11979 - 2³ = 11971 is a prime.

It is a nialpdrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (11971) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1084 + ... + 1094.

It is an arithmetic number, because the mean of its divisors is an integer number (1586).

2¹¹⁹⁷⁹ is an apocalyptic number.

11979 is a deficient number, since it is larger than the sum of its proper divisors (7053).

11979 is an equidigital number, since it uses as much as digits as its factorization.

11979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39 (or 14 counting only the distinct ones).

The product of its digits is 567, while the sum is 27.

The square root of 11979 is about 109.4486180817. The cubic root of 11979 is about 22.8809220536.

It can be divided in two parts, 11 and 979, that added together give a triangular number (990 = T₄₄).

The spelling of 11979 in words is "eleven thousand, nine hundred seventy-nine".