12682991 has 2 divisors, whose sum is σ = 12682992. Its totient is φ = 12682990.

The previous prime is 12682987. The next prime is 12683023. The reversal of 12682991 is 19928621.

It is a weak prime.

It is an emirp because it is prime and its reverse (19928621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12682991 - 2² = 12682987 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12682951) 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, 6341495 + 6341496.

It is an arithmetic number, because the mean of its divisors is an integer number (6341496).

Almost surely, 2^12682991 is an apocalyptic number.

12682991 is a deficient number, since it is larger than the sum of its proper divisors (1).

12682991 is an equidigital number, since it uses as much as digits as its factorization.

12682991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15552, while the sum is 38.

The square root of 12682991 is about 3561.3187164308. The cubic root of 12682991 is about 233.2064518789.

The spelling of 12682991 in words is "twelve million, six hundred eighty-two thousand, nine hundred ninety-one".