394143227 has 2 divisors, whose sum is σ = 394143228. Its totient is φ = 394143226.

The previous prime is 394143221. The next prime is 394143229. The reversal of 394143227 is 722341493.

It is a strong prime.

It is an emirp because it is prime and its reverse (722341493) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 394143227 - 2¹² = 394139131 is a prime.

Together with 394143229, 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 (394143221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197071613 + 197071614.

It is an arithmetic number, because the mean of its divisors is an integer number (197071614).

Almost surely, 2^394143227 is an apocalyptic number.

394143227 is a deficient number, since it is larger than the sum of its proper divisors (1).

394143227 is an equidigital number, since it uses as much as digits as its factorization.

394143227 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36288, while the sum is 35.

The square root of 394143227 is about 19853.0407494671. The cubic root of 394143227 is about 733.1925149491.

The spelling of 394143227 in words is "three hundred ninety-four million, one hundred forty-three thousand, two hundred twenty-seven".