517140287 has 2 divisors, whose sum is σ = 517140288. Its totient is φ = 517140286.

The previous prime is 517140269. The next prime is 517140307. The reversal of 517140287 is 782041715.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 517140287 - 2⁶ = 517140223 is a prime.

It is equal to p_27209960 and since 517140287 and 27209960 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (517140587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 258570143 + 258570144.

It is an arithmetic number, because the mean of its divisors is an integer number (258570144).

Almost surely, 2^517140287 is an apocalyptic number.

517140287 is a deficient number, since it is larger than the sum of its proper divisors (1).

517140287 is an equidigital number, since it uses as much as digits as its factorization.

517140287 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15680, while the sum is 35.

The square root of 517140287 is about 22740.7187001642. The cubic root of 517140287 is about 802.6683229831.

The spelling of 517140287 in words is "five hundred seventeen million, one hundred forty thousand, two hundred eighty-seven".