317220762491 has 2 divisors, whose sum is σ = 317220762492. Its totient is φ = 317220762490.

The previous prime is 317220762427. The next prime is 317220762499. The reversal of 317220762491 is 194267022713.

It is a strong prime.

It is an emirp because it is prime and its reverse (194267022713) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 317220762491 - 2⁶ = 317220762427 is a prime.

It is not a weakly prime, because it can be changed into another prime (317220762499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 158610381245 + 158610381246.

It is an arithmetic number, because the mean of its divisors is an integer number (158610381246).

Almost surely, 2^317220762491 is an apocalyptic number.

317220762491 is a deficient number, since it is larger than the sum of its proper divisors (1).

317220762491 is an equidigital number, since it uses as much as digits as its factorization.

317220762491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 254016, while the sum is 44.

The spelling of 317220762491 in words is "three hundred seventeen billion, two hundred twenty million, seven hundred sixty-two thousand, four hundred ninety-one".