517880317 has 2 divisors, whose sum is σ = 517880318. Its totient is φ = 517880316.

The previous prime is 517880309. The next prime is 517880371. The reversal of 517880317 is 713088715.

It is a happy number.

Together with next prime (517880371) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 473976441 + 43903876 = 21771^2 + 6626^2 .

It is a cyclic number.

It is not a de Polignac number, because 517880317 - 2³ = 517880309 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 517880317.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (517880417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 258940158 + 258940159.

It is an arithmetic number, because the mean of its divisors is an integer number (258940159).

Almost surely, 2^517880317 is an apocalyptic number.

It is an amenable number.

517880317 is a deficient number, since it is larger than the sum of its proper divisors (1).

517880317 is an equidigital number, since it uses as much as digits as its factorization.

517880317 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 47040, while the sum is 40.

The square root of 517880317 is about 22756.9839170308. The cubic root of 517880317 is about 803.0510144505.

The spelling of 517880317 in words is "five hundred seventeen million, eight hundred eighty thousand, three hundred seventeen".