317668637477 has 2 divisors, whose sum is σ = 317668637478. Its totient is φ = 317668637476.

The previous prime is 317668637471. The next prime is 317668637491. The reversal of 317668637477 is 774736866713.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 284130575521 + 33538061956 = 533039^2 + 183134^2 .

It is a cyclic number.

It is not a de Polignac number, because 317668637477 - 2²⁴ = 317651860261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (317668637471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 158834318738 + 158834318739.

It is an arithmetic number, because the mean of its divisors is an integer number (158834318739).

Almost surely, 2^317668637477 is an apocalyptic number.

It is an amenable number.

317668637477 is a deficient number, since it is larger than the sum of its proper divisors (1).

317668637477 is an equidigital number, since it uses as much as digits as its factorization.

317668637477 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 149361408, while the sum is 65.

The spelling of 317668637477 in words is "three hundred seventeen billion, six hundred sixty-eight million, six hundred thirty-seven thousand, four hundred seventy-seven".