12981679 has 2 divisors, whose sum is σ = 12981680. Its totient is φ = 12981678.

The previous prime is 12981667. The next prime is 12981691. The reversal of 12981679 is 97618921.

It is a balanced prime because it is at equal distance from previous prime (12981667) and next prime (12981691).

It is a cyclic number.

It is not a de Polignac number, because 12981679 - 2⁹ = 12981167 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12981649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6490839 + 6490840.

It is an arithmetic number, because the mean of its divisors is an integer number (6490840).

Almost surely, 2^12981679 is an apocalyptic number.

12981679 is a deficient number, since it is larger than the sum of its proper divisors (1).

12981679 is an equidigital number, since it uses as much as digits as its factorization.

12981679 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 54432, while the sum is 43.

The square root of 12981679 is about 3603.0097141140. The cubic root of 12981679 is about 235.0229583727.

The spelling of 12981679 in words is "twelve million, nine hundred eighty-one thousand, six hundred seventy-nine".