520412317 has 2 divisors, whose sum is σ = 520412318. Its totient is φ = 520412316.

The previous prime is 520412311. The next prime is 520412371. The reversal of 520412317 is 713214025.

It is a happy number.

Together with next prime (520412371) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 495552121 + 24860196 = 22261^2 + 4986^2 .

It is a cyclic number.

It is not a de Polignac number, because 520412317 - 2¹⁵ = 520379549 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 520412291 and 520412300.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (520412311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260206158 + 260206159.

It is an arithmetic number, because the mean of its divisors is an integer number (260206159).

Almost surely, 2^520412317 is an apocalyptic number.

It is an amenable number.

520412317 is a deficient number, since it is larger than the sum of its proper divisors (1).

520412317 is an equidigital number, since it uses as much as digits as its factorization.

520412317 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 520412317 is about 22812.5473588550. The cubic root of 520412317 is about 804.3576357698.

The spelling of 520412317 in words is "five hundred twenty million, four hundred twelve thousand, three hundred seventeen".