394605853361 has 2 divisors, whose sum is σ = 394605853362. Its totient is φ = 394605853360.

The previous prime is 394605853321. The next prime is 394605853363. The reversal of 394605853361 is 163358506493.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 311989273600 + 82616579761 = 558560^2 + 287431^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-394605853361 is a prime.

Together with 394605853363, 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 (394605853363) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197302926680 + 197302926681.

It is an arithmetic number, because the mean of its divisors is an integer number (197302926681).

Almost surely, 2^394605853361 is an apocalyptic number.

It is an amenable number.

394605853361 is a deficient number, since it is larger than the sum of its proper divisors (1).

394605853361 is an equidigital number, since it uses as much as digits as its factorization.

394605853361 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6998400, while the sum is 53.

The spelling of 394605853361 in words is "three hundred ninety-four billion, six hundred five million, eight hundred fifty-three thousand, three hundred sixty-one".