317487477817 has 4 divisors (see below), whose sum is σ = 317920612900. Its totient is φ = 317054342736.

The previous prime is 317487477799. The next prime is 317487477829. The reversal of 317487477817 is 718774784713.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 246185661241 + 71301816576 = 496171^2 + 267024^2 .

It is a cyclic number.

It is not a de Polignac number, because 317487477817 - 2¹¹ = 317487475769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (317487477877) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 216566442 + ... + 216567907.

It is an arithmetic number, because the mean of its divisors is an integer number (79480153225).

Almost surely, 2^317487477817 is an apocalyptic number.

It is an amenable number.

317487477817 is a deficient number, since it is larger than the sum of its proper divisors (433135083).

317487477817 is an equidigital number, since it uses as much as digits as its factorization.

317487477817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 433135082.

The product of its digits is 51631104, while the sum is 64.

The spelling of 317487477817 in words is "three hundred seventeen billion, four hundred eighty-seven million, four hundred seventy-seven thousand, eight hundred seventeen".