12979643 has 2 divisors, whose sum is σ = 12979644. Its totient is φ = 12979642.

The previous prime is 12979601. The next prime is 12979651. The reversal of 12979643 is 34697921.

It is a strong prime.

It is an emirp because it is prime and its reverse (34697921) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12979643 - 2⁶ = 12979579 is a prime.

It is a super-2 number, since 2×12979643² = 336942264814898, which contains 22 as substring.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12979643.

It is not a weakly prime, because it can be changed into another prime (12979693) 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, 6489821 + 6489822.

It is an arithmetic number, because the mean of its divisors is an integer number (6489822).

Almost surely, 2^12979643 is an apocalyptic number.

12979643 is a deficient number, since it is larger than the sum of its proper divisors (1).

12979643 is an equidigital number, since it uses as much as digits as its factorization.

12979643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 81648, while the sum is 41.

The square root of 12979643 is about 3602.7271614709. The cubic root of 12979643 is about 235.0106710108.

The spelling of 12979643 in words is "twelve million, nine hundred seventy-nine thousand, six hundred forty-three".