12847257991 has 2 divisors, whose sum is σ = 12847257992. Its totient is φ = 12847257990.

The previous prime is 12847257977. The next prime is 12847258019. The reversal of 12847257991 is 19975274821.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12847257991 - 2¹¹ = 12847255943 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12847257931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6423628995 + 6423628996.

It is an arithmetic number, because the mean of its divisors is an integer number (6423628996).

Almost surely, 2^12847257991 is an apocalyptic number.

12847257991 is a deficient number, since it is larger than the sum of its proper divisors (1).

12847257991 is an equidigital number, since it uses as much as digits as its factorization.

12847257991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2540160, while the sum is 55.

The spelling of 12847257991 in words is "twelve billion, eight hundred forty-seven million, two hundred fifty-seven thousand, nine hundred ninety-one".