12315017917 has 2 divisors, whose sum is σ = 12315017918. Its totient is φ = 12315017916.

The previous prime is 12315017887. The next prime is 12315017927. The reversal of 12315017917 is 71971051321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11668536441 + 646481476 = 108021^2 + 25426^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12315017917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12315017927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6157508958 + 6157508959.

It is an arithmetic number, because the mean of its divisors is an integer number (6157508959).

Almost surely, 2^12315017917 is an apocalyptic number.

It is an amenable number.

12315017917 is a deficient number, since it is larger than the sum of its proper divisors (1).

12315017917 is an equidigital number, since it uses as much as digits as its factorization.

12315017917 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13230, while the sum is 37.

The spelling of 12315017917 in words is "twelve billion, three hundred fifteen million, seventeen thousand, nine hundred seventeen".