163803634693 has 2 divisors, whose sum is σ = 163803634694. Its totient is φ = 163803634692.

The previous prime is 163803634663. The next prime is 163803634741. The reversal of 163803634693 is 396436308361.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 131135964129 + 32667670564 = 362127^2 + 180742^2 .

It is an emirp because it is prime and its reverse (396436308361) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 163803634693 - 2³⁷ = 26364681221 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 163803634693.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (163803634633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81901817346 + 81901817347.

It is an arithmetic number, because the mean of its divisors is an integer number (81901817347).

Almost surely, 2^163803634693 is an apocalyptic number.

It is an amenable number.

163803634693 is a deficient number, since it is larger than the sum of its proper divisors (1).

163803634693 is an equidigital number, since it uses as much as digits as its factorization.

163803634693 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5038848, while the sum is 52.

The spelling of 163803634693 in words is "one hundred sixty-three billion, eight hundred three million, six hundred thirty-four thousand, six hundred ninety-three".