394789907 has 2 divisors, whose sum is σ = 394789908. Its totient is φ = 394789906.

The previous prime is 394789897. The next prime is 394789909. The reversal of 394789907 is 709987493.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 394789907 - 2¹⁶ = 394724371 is a prime.

Together with 394789909, 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 (394789909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197394953 + 197394954.

It is an arithmetic number, because the mean of its divisors is an integer number (197394954).

Almost surely, 2^394789907 is an apocalyptic number.

394789907 is a deficient number, since it is larger than the sum of its proper divisors (1).

394789907 is an equidigital number, since it uses as much as digits as its factorization.

394789907 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3429216, while the sum is 56.

The square root of 394789907 is about 19869.3207483296. The cubic root of 394789907 is about 733.5932845407.

The spelling of 394789907 in words is "three hundred ninety-four million, seven hundred eighty-nine thousand, nine hundred seven".