317204897491 has 2 divisors, whose sum is σ = 317204897492. Its totient is φ = 317204897490.

The previous prime is 317204897479. The next prime is 317204897501. The reversal of 317204897491 is 194798402713.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 317204897491 - 2⁵ = 317204897459 is a prime.

It is not a weakly prime, because it can be changed into another prime (317204897411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 158602448745 + 158602448746.

It is an arithmetic number, because the mean of its divisors is an integer number (158602448746).

Almost surely, 2^317204897491 is an apocalyptic number.

317204897491 is a deficient number, since it is larger than the sum of its proper divisors (1).

317204897491 is an equidigital number, since it uses as much as digits as its factorization.

317204897491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3048192, while the sum is 55.

The spelling of 317204897491 in words is "three hundred seventeen billion, two hundred four million, eight hundred ninety-seven thousand, four hundred ninety-one".