12756979 has 2 divisors, whose sum is σ = 12756980. Its totient is φ = 12756978.

The previous prime is 12756977. The next prime is 12757049. The reversal of 12756979 is 97965721.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12756979 - 2¹ = 12756977 is a prime.

Together with 12756977, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12756977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6378489 + 6378490.

It is an arithmetic number, because the mean of its divisors is an integer number (6378490).

Almost surely, 2^12756979 is an apocalyptic number.

12756979 is a deficient number, since it is larger than the sum of its proper divisors (1).

12756979 is an equidigital number, since it uses as much as digits as its factorization.

12756979 is an evil number, because the sum of its binary digits is even.

The product of its digits is 238140, while the sum is 46.

The square root of 12756979 is about 3571.6913360480. The cubic root of 12756979 is about 233.6590537176.

The spelling of 12756979 in words is "twelve million, seven hundred fifty-six thousand, nine hundred seventy-nine".