817130313 has 18 divisors (see below), whose sum is σ = 1250269722. Its totient is φ = 512487360.

The previous prime is 817130291. The next prime is 817130317. The reversal of 817130313 is 313031718.

It can be written as a sum of positive squares in only one way, i.e., 769063824 + 48066489 = 27732^2 + 6933^2 .

It is not a de Polignac number, because 817130313 - 2⁹ = 817129801 is a prime.

It is not an unprimeable number, because it can be changed into a prime (817130317) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 352428 + ... + 354738.

It is an arithmetic number, because the mean of its divisors is an integer number (69459429).

Almost surely, 2^817130313 is an apocalyptic number.

It is an amenable number.

817130313 is a deficient number, since it is larger than the sum of its proper divisors (433139409).

817130313 is an equidigital number, since it uses as much as digits as its factorization.

817130313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4645 (or 2331 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 27.

The square root of 817130313 is about 28585.4913024072. The cubic root of 817130313 is about 934.8970166919.

The spelling of 817130313 in words is "eight hundred seventeen million, one hundred thirty thousand, three hundred thirteen".