317499474157 has 2 divisors, whose sum is σ = 317499474158. Its totient is φ = 317499474156.

The previous prime is 317499474139. The next prime is 317499474233. The reversal of 317499474157 is 751474994713.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 253196150596 + 64303323561 = 503186^2 + 253581^2 .

It is an emirp because it is prime and its reverse (751474994713) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 317499474157 - 2¹⁹ = 317498949869 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 317499474095 and 317499474104.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (317499474137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 158749737078 + 158749737079.

It is an arithmetic number, because the mean of its divisors is an integer number (158749737079).

Almost surely, 2^317499474157 is an apocalyptic number.

It is an amenable number.

317499474157 is a deficient number, since it is larger than the sum of its proper divisors (1).

317499474157 is an equidigital number, since it uses as much as digits as its factorization.

317499474157 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 26671680, while the sum is 61.

The spelling of 317499474157 in words is "three hundred seventeen billion, four hundred ninety-nine million, four hundred seventy-four thousand, one hundred fifty-seven".