517239497 has 2 divisors, whose sum is σ = 517239498. Its totient is φ = 517239496.

The previous prime is 517239491. The next prime is 517239511. The reversal of 517239497 is 794932715.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 328479376 + 188760121 = 18124^2 + 13739^2 .

It is a cyclic number.

It is not a de Polignac number, because 517239497 - 2¹⁸ = 516977353 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (517239491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 258619748 + 258619749.

It is an arithmetic number, because the mean of its divisors is an integer number (258619749).

Almost surely, 2^517239497 is an apocalyptic number.

It is an amenable number.

517239497 is a deficient number, since it is larger than the sum of its proper divisors (1).

517239497 is an equidigital number, since it uses as much as digits as its factorization.

517239497 is an evil number, because the sum of its binary digits is even.

The product of its digits is 476280, while the sum is 47.

The square root of 517239497 is about 22742.8999250315. The cubic root of 517239497 is about 802.7196485999.

The spelling of 517239497 in words is "five hundred seventeen million, two hundred thirty-nine thousand, four hundred ninety-seven".