478165217 has 2 divisors, whose sum is σ = 478165218. Its totient is φ = 478165216.

The previous prime is 478165187. The next prime is 478165223. The reversal of 478165217 is 712561874.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 464445601 + 13719616 = 21551^2 + 3704^2 .

It is a cyclic number.

It is not a de Polignac number, because 478165217 - 2¹⁸ = 477903073 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (478165277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 239082608 + 239082609.

It is an arithmetic number, because the mean of its divisors is an integer number (239082609).

Almost surely, 2^478165217 is an apocalyptic number.

It is an amenable number.

478165217 is a deficient number, since it is larger than the sum of its proper divisors (1).

478165217 is an equidigital number, since it uses as much as digits as its factorization.

478165217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 94080, while the sum is 41.

The square root of 478165217 is about 21866.9892074789. The cubic root of 478165217 is about 781.9746248659.

The spelling of 478165217 in words is "four hundred seventy-eight million, one hundred sixty-five thousand, two hundred seventeen".