517445393 has 2 divisors, whose sum is σ = 517445394. Its totient is φ = 517445392.

The previous prime is 517445381. The next prime is 517445443. The reversal of 517445393 is 393544715.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 262180864 + 255264529 = 16192^2 + 15977^2 .

It is a cyclic number.

It is not a de Polignac number, because 517445393 - 2¹² = 517441297 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 517445393.

It is not a weakly prime, because it can be changed into another prime (517445353) 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, 258722696 + 258722697.

It is an arithmetic number, because the mean of its divisors is an integer number (258722697).

Almost surely, 2^517445393 is an apocalyptic number.

It is an amenable number.

517445393 is a deficient number, since it is larger than the sum of its proper divisors (1).

517445393 is an equidigital number, since it uses as much as digits as its factorization.

517445393 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 226800, while the sum is 41.

The square root of 517445393 is about 22747.4260741738. The cubic root of 517445393 is about 802.8261465505.

The spelling of 517445393 in words is "five hundred seventeen million, four hundred forty-five thousand, three hundred ninety-three".