394675613 has 2 divisors, whose sum is σ = 394675614. Its totient is φ = 394675612.

The previous prime is 394675537. The next prime is 394675639. The reversal of 394675613 is 316576493.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 199430884 + 195244729 = 14122^2 + 13973^2 .

It is an emirp because it is prime and its reverse (316576493) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 394675613 - 2⁸ = 394675357 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (394675693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197337806 + 197337807.

It is an arithmetic number, because the mean of its divisors is an integer number (197337807).

Almost surely, 2^394675613 is an apocalyptic number.

It is an amenable number.

394675613 is a deficient number, since it is larger than the sum of its proper divisors (1).

394675613 is an equidigital number, since it uses as much as digits as its factorization.

394675613 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 408240, while the sum is 44.

The square root of 394675613 is about 19866.4443975262. Note that the first 3 decimals coincide. The cubic root of 394675613 is about 733.5224845178.

The spelling of 394675613 in words is "three hundred ninety-four million, six hundred seventy-five thousand, six hundred thirteen".