12387671 has 2 divisors, whose sum is σ = 12387672. Its totient is φ = 12387670.

The previous prime is 12387659. The next prime is 12387673. The reversal of 12387671 is 17678321.

It is a strong prime.

It is an emirp because it is prime and its reverse (17678321) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12387671 is a prime.

It is a Sophie Germain prime.

Together with 12387673, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12387673) 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, 6193835 + 6193836.

It is an arithmetic number, because the mean of its divisors is an integer number (6193836).

Almost surely, 2^12387671 is an apocalyptic number.

12387671 is a deficient number, since it is larger than the sum of its proper divisors (1).

12387671 is an equidigital number, since it uses as much as digits as its factorization.

12387671 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14112, while the sum is 35.

The square root of 12387671 is about 3519.6123366075. The cubic root of 12387671 is about 231.3821688090.

The spelling of 12387671 in words is "twelve million, three hundred eighty-seven thousand, six hundred seventy-one".