12783862717 has 2 divisors, whose sum is σ = 12783862718. Its totient is φ = 12783862716.

The previous prime is 12783862699. The next prime is 12783862727. The reversal of 12783862717 is 71726838721.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10045852441 + 2738010276 = 100229^2 + 52326^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12783862717 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12783862727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6391931358 + 6391931359.

It is an arithmetic number, because the mean of its divisors is an integer number (6391931359).

Almost surely, 2^12783862717 is an apocalyptic number.

It is an amenable number.

12783862717 is a deficient number, since it is larger than the sum of its proper divisors (1).

12783862717 is an equidigital number, since it uses as much as digits as its factorization.

12783862717 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1580544, while the sum is 52.

The spelling of 12783862717 in words is "twelve billion, seven hundred eighty-three million, eight hundred sixty-two thousand, seven hundred seventeen".