12934885991 has 2 divisors, whose sum is σ = 12934885992. Its totient is φ = 12934885990.

The previous prime is 12934885919. The next prime is 12934885993. The reversal of 12934885991 is 19958843921.

Together with previous prime (12934885919) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12934885991 - 2¹⁸ = 12934623847 is a prime.

It is a super-2 number, since 2×12934885991² (a number of 21 digits) contains 22 as substring.

Together with 12934885993, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12934885991.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12934885993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6467442995 + 6467442996.

It is an arithmetic number, because the mean of its divisors is an integer number (6467442996).

Almost surely, 2^12934885991 is an apocalyptic number.

12934885991 is a deficient number, since it is larger than the sum of its proper divisors (1).

12934885991 is an equidigital number, since it uses as much as digits as its factorization.

12934885991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5598720, while the sum is 59.

The spelling of 12934885991 in words is "twelve billion, nine hundred thirty-four million, eight hundred eighty-five thousand, nine hundred ninety-one".