163808563 has 2 divisors, whose sum is σ = 163808564. Its totient is φ = 163808562.

The previous prime is 163808539. The next prime is 163808597. The reversal of 163808563 is 365808361.

It is a weak prime.

It is an emirp because it is prime and its reverse (365808361) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 163808563 - 2²¹ = 161711411 is a prime.

It is not a weakly prime, because it can be changed into another prime (163808503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81904281 + 81904282.

It is an arithmetic number, because the mean of its divisors is an integer number (81904282).

Almost surely, 2^163808563 is an apocalyptic number.

163808563 is a deficient number, since it is larger than the sum of its proper divisors (1).

163808563 is an equidigital number, since it uses as much as digits as its factorization.

163808563 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 103680, while the sum is 40.

The square root of 163808563 is about 12798.7719332755. The cubic root of 163808563 is about 547.1573029675.

The spelling of 163808563 in words is "one hundred sixty-three million, eight hundred eight thousand, five hundred sixty-three".