317979517 has 8 divisors (see below), whose sum is σ = 327628856. Its totient is φ = 308385792.

The previous prime is 317979499. The next prime is 317979547. The reversal of 317979517 is 715979713.

It can be written as a sum of positive squares in 4 ways, for example, as 106276 + 317873241 = 326^2 + 17829^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 317979517 - 2²³ = 309590909 is a prime.

It is a super-2 number, since 2×317979517² = 202221946463106578, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (317979547) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2148 + ... + 25309.

It is an arithmetic number, because the mean of its divisors is an integer number (40953607).

Almost surely, 2^317979517 is an apocalyptic number.

317979517 is a gapful number since it is divisible by the number (37) formed by its first and last digit.

It is an amenable number.

317979517 is a deficient number, since it is larger than the sum of its proper divisors (9649339).

317979517 is a wasteful number, since it uses less digits than its factorization.

317979517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27807.

The product of its digits is 416745, while the sum is 49.

The square root of 317979517 is about 17831.9801760769. The cubic root of 317979517 is about 682.5477642823.

It can be divided in two parts, 31797 and 9517, that added together give a palindrome (41314).

The spelling of 317979517 in words is "three hundred seventeen million, nine hundred seventy-nine thousand, five hundred seventeen".