394618013 has 2 divisors, whose sum is σ = 394618014. Its totient is φ = 394618012.

The previous prime is 394617983. The next prime is 394618027. The reversal of 394618013 is 310816493.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 266407684 + 128210329 = 16322^2 + 11323^2 .

It is a cyclic number.

It is not a de Polignac number, because 394618013 - 2¹⁸ = 394355869 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (394618043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197309006 + 197309007.

It is an arithmetic number, because the mean of its divisors is an integer number (197309007).

Almost surely, 2^394618013 is an apocalyptic number.

It is an amenable number.

394618013 is a deficient number, since it is larger than the sum of its proper divisors (1).

394618013 is an equidigital number, since it uses as much as digits as its factorization.

394618013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 394618013 is about 19864.9946639812. The cubic root of 394618013 is about 733.4867987129.

It can be divided in two parts, 39461 and 8013, that added together give a palindrome (47474).

The spelling of 394618013 in words is "three hundred ninety-four million, six hundred eighteen thousand, thirteen".