163604873 has 4 divisors (see below), whose sum is σ = 165443220. Its totient is φ = 161766528.

The previous prime is 163604851. The next prime is 163604897. The reversal of 163604873 is 378406361.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 378406361 = 647 ⋅584863.

It can be written as a sum of positive squares in 2 ways, for example, as 90878089 + 72726784 = 9533^2 + 8528^2 .

It is a cyclic number.

It is not a de Polignac number, because 163604873 - 2¹² = 163600777 is a prime.

It is a super-2 number, since 2×163604873² = 53533108938692258, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (163604843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 919040 + ... + 919217.

It is an arithmetic number, because the mean of its divisors is an integer number (41360805).

Almost surely, 2^163604873 is an apocalyptic number.

It is an amenable number.

163604873 is a deficient number, since it is larger than the sum of its proper divisors (1838347).

163604873 is an equidigital number, since it uses as much as digits as its factorization.

163604873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1838346.

The product of its (nonzero) digits is 72576, while the sum is 38.

The square root of 163604873 is about 12790.8120539706. The cubic root of 163604873 is about 546.9304188214.

The spelling of 163604873 in words is "one hundred sixty-three million, six hundred four thousand, eight hundred seventy-three".