394212443 has 2 divisors, whose sum is σ = 394212444. Its totient is φ = 394212442.

The previous prime is 394212419. The next prime is 394212451. The reversal of 394212443 is 344212493.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 394212443 - 2⁸ = 394212187 is a prime.

It is not a weakly prime, because it can be changed into another prime (394212493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197106221 + 197106222.

It is an arithmetic number, because the mean of its divisors is an integer number (197106222).

Almost surely, 2^394212443 is an apocalyptic number.

394212443 is a deficient number, since it is larger than the sum of its proper divisors (1).

394212443 is an equidigital number, since it uses as much as digits as its factorization.

394212443 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20736, while the sum is 32.

The square root of 394212443 is about 19854.7838819767. The cubic root of 394212443 is about 733.2354313978.

The spelling of 394212443 in words is "three hundred ninety-four million, two hundred twelve thousand, four hundred forty-three".