517923397 has 2 divisors, whose sum is σ = 517923398. Its totient is φ = 517923396.

The previous prime is 517923391. The next prime is 517923401. The reversal of 517923397 is 793329715.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 485364961 + 32558436 = 22031^2 + 5706^2 .

It is a cyclic number.

It is not a de Polignac number, because 517923397 - 2¹⁵ = 517890629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (517923391) 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, 258961698 + 258961699.

It is an arithmetic number, because the mean of its divisors is an integer number (258961699).

Almost surely, 2^517923397 is an apocalyptic number.

It is an amenable number.

517923397 is a deficient number, since it is larger than the sum of its proper divisors (1).

517923397 is an equidigital number, since it uses as much as digits as its factorization.

517923397 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 357210, while the sum is 46.

The square root of 517923397 is about 22757.9304199657. The cubic root of 517923397 is about 803.0732811644.

The spelling of 517923397 in words is "five hundred seventeen million, nine hundred twenty-three thousand, three hundred ninety-seven".