394516193 has 2 divisors, whose sum is σ = 394516194. Its totient is φ = 394516192.

The previous prime is 394516147. The next prime is 394516253. The reversal of 394516193 is 391615493.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 303351889 + 91164304 = 17417^2 + 9548^2 .

It is an emirp because it is prime and its reverse (391615493) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 394516193 - 2⁸ = 394515937 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 394516193.

It is not a weakly prime, because it can be changed into another prime (394516103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197258096 + 197258097.

It is an arithmetic number, because the mean of its divisors is an integer number (197258097).

Almost surely, 2^394516193 is an apocalyptic number.

It is an amenable number.

394516193 is a deficient number, since it is larger than the sum of its proper divisors (1).

394516193 is an equidigital number, since it uses as much as digits as its factorization.

394516193 is an evil number, because the sum of its binary digits is even.

The product of its digits is 87480, while the sum is 41.

The square root of 394516193 is about 19862.4316990644. The cubic root of 394516193 is about 733.4237081227.

The spelling of 394516193 in words is "three hundred ninety-four million, five hundred sixteen thousand, one hundred ninety-three".