517820117207 has 2 divisors, whose sum is σ = 517820117208. Its totient is φ = 517820117206.

The previous prime is 517820117189. The next prime is 517820117209. The reversal of 517820117207 is 702711028715.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 517820117207 - 2³⁴ = 500640248023 is a prime.

Together with 517820117209, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (517820117209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 258910058603 + 258910058604.

It is an arithmetic number, because the mean of its divisors is an integer number (258910058604).

Almost surely, 2^517820117207 is an apocalyptic number.

517820117207 is a deficient number, since it is larger than the sum of its proper divisors (1).

517820117207 is an equidigital number, since it uses as much as digits as its factorization.

517820117207 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54880, while the sum is 41.

The spelling of 517820117207 in words is "five hundred seventeen billion, eight hundred twenty million, one hundred seventeen thousand, two hundred seven".