475420217 has 2 divisors, whose sum is σ = 475420218. Its totient is φ = 475420216.

The previous prime is 475420199. The next prime is 475420219. The reversal of 475420217 is 712024574.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 400960576 + 74459641 = 20024^2 + 8629^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-475420217 is a prime.

Together with 475420219, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (475420219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 237710108 + 237710109.

It is an arithmetic number, because the mean of its divisors is an integer number (237710109).

Almost surely, 2^475420217 is an apocalyptic number.

It is an amenable number.

475420217 is a deficient number, since it is larger than the sum of its proper divisors (1).

475420217 is an equidigital number, since it uses as much as digits as its factorization.

475420217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15680, while the sum is 32.

The square root of 475420217 is about 21804.1330256445. The cubic root of 475420217 is about 780.4753934118.

The spelling of 475420217 in words is "four hundred seventy-five million, four hundred twenty thousand, two hundred seventeen".