394675397 has 2 divisors, whose sum is σ = 394675398. Its totient is φ = 394675396.

The previous prime is 394675373. The next prime is 394675399. The reversal of 394675397 is 793576493.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 343323841 + 51351556 = 18529^2 + 7166^2 .

It is a cyclic number.

It is not a de Polignac number, because 394675397 - 2¹⁶ = 394609861 is a prime.

Together with 394675399, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (394675399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197337698 + 197337699.

It is an arithmetic number, because the mean of its divisors is an integer number (197337699).

Almost surely, 2^394675397 is an apocalyptic number.

It is an amenable number.

394675397 is a deficient number, since it is larger than the sum of its proper divisors (1).

394675397 is an equidigital number, since it uses as much as digits as its factorization.

394675397 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4286520, while the sum is 53.

The square root of 394675397 is about 19866.4389612230. The cubic root of 394675397 is about 733.5223507025.

The spelling of 394675397 in words is "three hundred ninety-four million, six hundred seventy-five thousand, three hundred ninety-seven".