517853342309 has 2 divisors, whose sum is σ = 517853342310. Its totient is φ = 517853342308.

The previous prime is 517853342203. The next prime is 517853342317. The reversal of 517853342309 is 903243358715.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 421399617409 + 96453724900 = 649153^2 + 310570^2 .

It is a cyclic number.

It is not a de Polignac number, because 517853342309 - 2³² = 513558375013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (517853342009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 258926671154 + 258926671155.

It is an arithmetic number, because the mean of its divisors is an integer number (258926671155).

Almost surely, 2^517853342309 is an apocalyptic number.

It is an amenable number.

517853342309 is a deficient number, since it is larger than the sum of its proper divisors (1).

517853342309 is an equidigital number, since it uses as much as digits as its factorization.

517853342309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2721600, while the sum is 50.

The spelling of 517853342309 in words is "five hundred seventeen billion, eight hundred fifty-three million, three hundred forty-two thousand, three hundred nine".