63685217 has 2 divisors, whose sum is σ = 63685218. Its totient is φ = 63685216.

The previous prime is 63685211. The next prime is 63685231. The reversal of 63685217 is 71258636.

63685217 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39488656 + 24196561 = 6284^2 + 4919^2 .

It is a cyclic number.

It is not a de Polignac number, because 63685217 - 2⁴ = 63685201 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (63685211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31842608 + 31842609.

It is an arithmetic number, because the mean of its divisors is an integer number (31842609).

Almost surely, 2^63685217 is an apocalyptic number.

It is an amenable number.

63685217 is a deficient number, since it is larger than the sum of its proper divisors (1).

63685217 is an equidigital number, since it uses as much as digits as its factorization.

63685217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 60480, while the sum is 38.

The square root of 63685217 is about 7980.3018113352. The cubic root of 63685217 is about 399.3431239585.

The spelling of 63685217 in words is "sixty-three million, six hundred eighty-five thousand, two hundred seventeen".