520717 has 2 divisors, whose sum is σ = 520718. Its totient is φ = 520716.

The previous prime is 520703. The next prime is 520721. The reversal of 520717 is 717025.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 434281 + 86436 = 659^2 + 294^2 .

It is a cyclic number.

It is not a de Polignac number, because 520717 - 2⁷ = 520589 is a prime.

It is a super-2 number, since 2×520717² = 542292388178, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (520747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260358 + 260359.

It is an arithmetic number, because the mean of its divisors is an integer number (260359).

2⁵²⁰⁷¹⁷ is an apocalyptic number.

It is an amenable number.

520717 is a deficient number, since it is larger than the sum of its proper divisors (1).

520717 is an equidigital number, since it uses as much as digits as its factorization.

520717 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 490, while the sum is 22.

The square root of 520717 is about 721.6072338884. The cubic root of 520717 is about 80.4514579458.

The spelling of 520717 in words is "five hundred twenty thousand, seven hundred seventeen".