317856973 has 24 divisors (see below), whose sum is σ = 402122232. Its totient is φ = 249467904.

The previous prime is 317856961. The next prime is 317856991. The reversal of 317856973 is 379658713.

It can be written as a sum of positive squares in 4 ways, for example, as 139287204 + 178569769 = 11802^2 + 13363^2 .

It is a de Polignac number, because none of the positive numbers 2^k-317856973 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (317856943) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25665 + ... + 35977.

It is an arithmetic number, because the mean of its divisors is an integer number (16755093).

Almost surely, 2^317856973 is an apocalyptic number.

It is an amenable number.

317856973 is a deficient number, since it is larger than the sum of its proper divisors (84265259).

317856973 is a wasteful number, since it uses less digits than its factorization.

317856973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10381 (or 10374 counting only the distinct ones).

The product of its digits is 952560, while the sum is 49.

The square root of 317856973 is about 17828.5437711553. The cubic root of 317856973 is about 682.4600721766.

The spelling of 317856973 in words is "three hundred seventeen million, eight hundred fifty-six thousand, nine hundred seventy-three".