517730313 has 4 divisors (see below), whose sum is σ = 690307088. Its totient is φ = 345153540.

The previous prime is 517730309. The next prime is 517730321. The reversal of 517730313 is 313037715.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 517730313 - 2² = 517730309 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (517730383) 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, 86288383 + ... + 86288388.

It is an arithmetic number, because the mean of its divisors is an integer number (172576772).

Almost surely, 2^517730313 is an apocalyptic number.

It is an amenable number.

517730313 is a deficient number, since it is larger than the sum of its proper divisors (172576775).

517730313 is a wasteful number, since it uses less digits than its factorization.

517730313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172576774.

The product of its (nonzero) digits is 6615, while the sum is 30.

The square root of 517730313 is about 22753.6878988880. The cubic root of 517730313 is about 802.9734724054.

The spelling of 517730313 in words is "five hundred seventeen million, seven hundred thirty thousand, three hundred thirteen".