163605473 has 2 divisors, whose sum is σ = 163605474. Its totient is φ = 163605472.

The previous prime is 163605451. The next prime is 163605479. The reversal of 163605473 is 374506361.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 113379904 + 50225569 = 10648^2 + 7087^2 .

It is an emirp because it is prime and its reverse (374506361) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 163605473 - 2¹² = 163601377 is a prime.

It is not a weakly prime, because it can be changed into another prime (163605479) 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, 81802736 + 81802737.

It is an arithmetic number, because the mean of its divisors is an integer number (81802737).

Almost surely, 2^163605473 is an apocalyptic number.

It is an amenable number.

163605473 is a deficient number, since it is larger than the sum of its proper divisors (1).

163605473 is an equidigital number, since it uses as much as digits as its factorization.

163605473 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 45360, while the sum is 35.

The square root of 163605473 is about 12790.8355082848. The cubic root of 163605473 is about 546.9310874197.

The spelling of 163605473 in words is "one hundred sixty-three million, six hundred five thousand, four hundred seventy-three".