163563313 has 2 divisors, whose sum is σ = 163563314. Its totient is φ = 163563312.

The previous prime is 163563311. The next prime is 163563317. The reversal of 163563313 is 313365361.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 114661264 + 48902049 = 10708^2 + 6993^2 .

It is a cyclic number.

It is not a de Polignac number, because 163563313 - 2¹ = 163563311 is a prime.

Together with 163563311, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (163563311) 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 as a sum of consecutive naturals, namely, 81781656 + 81781657.

It is an arithmetic number, because the mean of its divisors is an integer number (81781657).

Almost surely, 2^163563313 is an apocalyptic number.

It is an amenable number.

163563313 is a deficient number, since it is larger than the sum of its proper divisors (1).

163563313 is an equidigital number, since it uses as much as digits as its factorization.

163563313 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14580, while the sum is 31.

The square root of 163563313 is about 12789.1873471304. The cubic root of 163563313 is about 546.8841032629.

The spelling of 163563313 in words is "one hundred sixty-three million, five hundred sixty-three thousand, three hundred thirteen".