394566163 has 2 divisors, whose sum is σ = 394566164. Its totient is φ = 394566162.

The previous prime is 394566143. The next prime is 394566169. The reversal of 394566163 is 361665493.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 394566163 - 2⁹ = 394565651 is a prime.

It is not a weakly prime, because it can be changed into another prime (394566169) 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, 197283081 + 197283082.

It is an arithmetic number, because the mean of its divisors is an integer number (197283082).

Almost surely, 2^394566163 is an apocalyptic number.

394566163 is a deficient number, since it is larger than the sum of its proper divisors (1).

394566163 is an equidigital number, since it uses as much as digits as its factorization.

394566163 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 349920, while the sum is 43.

The square root of 394566163 is about 19863.6895616096. The cubic root of 394566163 is about 733.4546723232.

The spelling of 394566163 in words is "three hundred ninety-four million, five hundred sixty-six thousand, one hundred sixty-three".