521412317 has 2 divisors, whose sum is σ = 521412318. Its totient is φ = 521412316.

The previous prime is 521412299. The next prime is 521412319. The reversal of 521412317 is 713214125.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 512297956 + 9114361 = 22634^2 + 3019^2 .

It is a cyclic number.

It is not a de Polignac number, because 521412317 - 2²⁶ = 454303453 is a prime.

Together with 521412319, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (521412319) 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, 260706158 + 260706159.

It is an arithmetic number, because the mean of its divisors is an integer number (260706159).

Almost surely, 2^521412317 is an apocalyptic number.

It is an amenable number.

521412317 is a deficient number, since it is larger than the sum of its proper divisors (1).

521412317 is an equidigital number, since it uses as much as digits as its factorization.

521412317 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1680, while the sum is 26.

The square root of 521412317 is about 22834.4546026394. The cubic root of 521412317 is about 804.8725114773.

The spelling of 521412317 in words is "five hundred twenty-one million, four hundred twelve thousand, three hundred seventeen".