521713417 has 2 divisors, whose sum is σ = 521713418. Its totient is φ = 521713416.

The previous prime is 521713411. The next prime is 521713421. The reversal of 521713417 is 714317125.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 270142096 + 251571321 = 16436^2 + 15861^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-521713417 is a prime.

It is not a weakly prime, because it can be changed into another prime (521713411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260856708 + 260856709.

It is an arithmetic number, because the mean of its divisors is an integer number (260856709).

Almost surely, 2^521713417 is an apocalyptic number.

It is an amenable number.

521713417 is a deficient number, since it is larger than the sum of its proper divisors (1).

521713417 is an equidigital number, since it uses as much as digits as its factorization.

521713417 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5880, while the sum is 31.

The square root of 521713417 is about 22841.0467579750. The cubic root of 521713417 is about 805.0274115892.

The spelling of 521713417 in words is "five hundred twenty-one million, seven hundred thirteen thousand, four hundred seventeen".