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12679 = 31409

12679 has 4 divisors (see below), whose sum is σ = 13120. Its totient is φ = 12240.

The previous prime is 12671. The next prime is 12689. The reversal of 12679 is 97621.

12679 is digitally balanced in base 2, 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, and also an emirpimes, since its reverse is a distinct semiprime: 97621 = 412381.

It is a cyclic number.

It is not a de Polignac number, because 12679 - 23 = 12671 is a prime.

It is a Duffinian number.

12679 is a lucky number.

It is a plaindrome in base 10 and base 14.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 174 + ... + 235.

It is an arithmetic number, because the mean of its divisors is an integer number (3280).

212679 is an apocalyptic number.

12679 is a deficient number, since it is larger than the sum of its proper divisors (441).

12679 is an equidigital number, since it uses as much as digits as its factorization.

12679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 440.

The product of its digits is 756, while the sum is 25.

The square root of 12679 is about 112.6010657143. The cubic root of 12679 is about 23.3181988023.

The spelling of 12679 in words is "twelve thousand, six hundred seventy-nine".

Divisors: 1 31 409 12679