394143427 has 2 divisors, whose sum is σ = 394143428. Its totient is φ = 394143426.

The previous prime is 394143401. The next prime is 394143527. The reversal of 394143427 is 724341493.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 394143427 - 2¹⁵ = 394110659 is a prime.

It is not a weakly prime, because it can be changed into another prime (394143227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197071713 + 197071714.

It is an arithmetic number, because the mean of its divisors is an integer number (197071714).

Almost surely, 2^394143427 is an apocalyptic number.

394143427 is a deficient number, since it is larger than the sum of its proper divisors (1).

394143427 is an equidigital number, since it uses as much as digits as its factorization.

394143427 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72576, while the sum is 37.

The square root of 394143427 is about 19853.0457864782. The cubic root of 394143427 is about 733.1926389637.

The spelling of 394143427 in words is "three hundred ninety-four million, one hundred forty-three thousand, four hundred twenty-seven".