12973781366831 has 2 divisors, whose sum is σ = 12973781366832. Its totient is φ = 12973781366830.

The previous prime is 12973781366771. The next prime is 12973781366857. The reversal of 12973781366831 is 13866318737921.

12973781366831 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12973781366831 - 2²² = 12973777172527 is a prime.

It is a super-2 number, since 2×12973781366831² (a number of 27 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12973781366131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6486890683415 + 6486890683416.

It is an arithmetic number, because the mean of its divisors is an integer number (6486890683416).

Almost surely, 2^{12973781366831} is an apocalyptic number.

12973781366831 is a deficient number, since it is larger than the sum of its proper divisors (1).

12973781366831 is an equidigital number, since it uses as much as digits as its factorization.

12973781366831 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54867456, while the sum is 65.

The spelling of 12973781366831 in words is "twelve trillion, nine hundred seventy-three billion, seven hundred eighty-one million, three hundred sixty-six thousand, eight hundred thirty-one".