317765978693 has 2 divisors, whose sum is σ = 317765978694. Its totient is φ = 317765978692.

The previous prime is 317765978483. The next prime is 317765978701. The reversal of 317765978693 is 396879567713.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 244098247969 + 73667730724 = 494063^2 + 271418^2 .

It is a cyclic number.

It is not a de Polignac number, because 317765978693 - 2¹⁴ = 317765962309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (317765968693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 158882989346 + 158882989347.

It is an arithmetic number, because the mean of its divisors is an integer number (158882989347).

Almost surely, 2^317765978693 is an apocalyptic number.

It is an amenable number.

317765978693 is a deficient number, since it is larger than the sum of its proper divisors (1).

317765978693 is an equidigital number, since it uses as much as digits as its factorization.

317765978693 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 360067680, while the sum is 71.

The spelling of 317765978693 in words is "three hundred seventeen billion, seven hundred sixty-five million, nine hundred seventy-eight thousand, six hundred ninety-three".