517340393 has 2 divisors, whose sum is σ = 517340394. Its totient is φ = 517340392.

The previous prime is 517340387. The next prime is 517340423. The reversal of 517340393 is 393043715.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 474673369 + 42667024 = 21787^2 + 6532^2 .

It is a cyclic number.

It is not a de Polignac number, because 517340393 - 2¹⁰ = 517339369 is a prime.

It is not a weakly prime, because it can be changed into another prime (517340323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 258670196 + 258670197.

It is an arithmetic number, because the mean of its divisors is an integer number (258670197).

Almost surely, 2^517340393 is an apocalyptic number.

It is an amenable number.

517340393 is a deficient number, since it is larger than the sum of its proper divisors (1).

517340393 is an equidigital number, since it uses as much as digits as its factorization.

517340393 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34020, while the sum is 35.

The square root of 517340393 is about 22745.1180036508. The cubic root of 517340393 is about 802.7718397263.

The spelling of 517340393 in words is "five hundred seventeen million, three hundred forty thousand, three hundred ninety-three".