12779 has 4 divisors (see below), whose sum is σ = 13776. Its totient is φ = 11784.

The previous prime is 12763. The next prime is 12781. The reversal of 12779 is 97721.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97721 = 13 ⋅7517.

It is a cyclic number.

It is not a de Polignac number, because 12779 - 2⁴ = 12763 is a prime.

It is a Duffinian number.

It is a plaindrome in base 10 and base 15.

It is not an unprimeable number, because it can be changed into a prime (12739) 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, 479 + ... + 504.

It is an arithmetic number, because the mean of its divisors is an integer number (3444).

2¹²⁷⁷⁹ is an apocalyptic number.

12779 is a deficient number, since it is larger than the sum of its proper divisors (997).

12779 is an equidigital number, since it uses as much as digits as its factorization.

12779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 996.

The product of its digits is 882, while the sum is 26.

The square root of 12779 is about 113.0442391279. The cubic root of 12779 is about 23.3793423258.

The spelling of 12779 in words is "twelve thousand, seven hundred seventy-nine".