12938671687 has 2 divisors, whose sum is σ = 12938671688. Its totient is φ = 12938671686.

The previous prime is 12938671667. The next prime is 12938671751. The reversal of 12938671687 is 78617683921.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12938671687 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12938671607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6469335843 + 6469335844.

It is an arithmetic number, because the mean of its divisors is an integer number (6469335844).

Almost surely, 2^12938671687 is an apocalyptic number.

12938671687 is a deficient number, since it is larger than the sum of its proper divisors (1).

12938671687 is an equidigital number, since it uses as much as digits as its factorization.

12938671687 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6096384, while the sum is 58.

The spelling of 12938671687 in words is "twelve billion, nine hundred thirty-eight million, six hundred seventy-one thousand, six hundred eighty-seven".