518087417 has 2 divisors, whose sum is σ = 518087418. Its totient is φ = 518087416.

The previous prime is 518087413. The next prime is 518087441. The reversal of 518087417 is 714780815.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 336942736 + 181144681 = 18356^2 + 13459^2 .

It is a cyclic number.

It is not a de Polignac number, because 518087417 - 2² = 518087413 is a prime.

It is a Chen prime.

It is equal to p_27257288 and since 518087417 and 27257288 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (518087413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 259043708 + 259043709.

It is an arithmetic number, because the mean of its divisors is an integer number (259043709).

Almost surely, 2^518087417 is an apocalyptic number.

It is an amenable number.

518087417 is a deficient number, since it is larger than the sum of its proper divisors (1).

518087417 is an equidigital number, since it uses as much as digits as its factorization.

518087417 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 62720, while the sum is 41.

The square root of 518087417 is about 22761.5337137022. The cubic root of 518087417 is about 803.1580467095.

The spelling of 518087417 in words is "five hundred eighteen million, eighty-seven thousand, four hundred seventeen".