12912709687 has 2 divisors, whose sum is σ = 12912709688. Its totient is φ = 12912709686.

The previous prime is 12912709637. The next prime is 12912709709. The reversal of 12912709687 is 78690721921.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12912709687 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12912709627) 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, 6456354843 + 6456354844.

It is an arithmetic number, because the mean of its divisors is an integer number (6456354844).

Almost surely, 2^12912709687 is an apocalyptic number.

12912709687 is a deficient number, since it is larger than the sum of its proper divisors (1).

12912709687 is an equidigital number, since it uses as much as digits as its factorization.

12912709687 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 762048, while the sum is 52.

The spelling of 12912709687 in words is "twelve billion, nine hundred twelve million, seven hundred nine thousand, six hundred eighty-seven".