394318427 has 2 divisors, whose sum is σ = 394318428. Its totient is φ = 394318426.

The previous prime is 394318411. The next prime is 394318453. The reversal of 394318427 is 724813493.

It is a weak prime.

It is an emirp because it is prime and its reverse (724813493) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 394318427 - 2⁴ = 394318411 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (394318487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197159213 + 197159214.

It is an arithmetic number, because the mean of its divisors is an integer number (197159214).

Almost surely, 2^394318427 is an apocalyptic number.

394318427 is a deficient number, since it is larger than the sum of its proper divisors (1).

394318427 is an equidigital number, since it uses as much as digits as its factorization.

394318427 is an evil number, because the sum of its binary digits is even.

The product of its digits is 145152, while the sum is 41.

The square root of 394318427 is about 19857.4526815501. The cubic root of 394318427 is about 733.3011356157.

The spelling of 394318427 in words is "three hundred ninety-four million, three hundred eighteen thousand, four hundred twenty-seven".