163403563 has 4 divisors (see below), whose sum is σ = 163429848. Its totient is φ = 163377280.

The previous prime is 163403561. The next prime is 163403587. The reversal of 163403563 is 365304361.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 163403563 - 2¹ = 163403561 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (163403561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1995 + ... + 18187.

It is an arithmetic number, because the mean of its divisors is an integer number (40857462).

Almost surely, 2^163403563 is an apocalyptic number.

163403563 is a deficient number, since it is larger than the sum of its proper divisors (26285).

163403563 is a wasteful number, since it uses less digits than its factorization.

163403563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26284.

The product of its (nonzero) digits is 19440, while the sum is 31.

The square root of 163403563 is about 12782.9403112117. The cubic root of 163403563 is about 546.7060005821.

The spelling of 163403563 in words is "one hundred sixty-three million, four hundred three thousand, five hundred sixty-three".