163538873 has 4 divisors (see below), whose sum is σ = 167527668. Its totient is φ = 159550080.

The previous prime is 163538863. The next prime is 163538887. The reversal of 163538873 is 378835361.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7463824 + 156075049 = 2732^2 + 12493^2 .

It is a cyclic number.

It is not a de Polignac number, because 163538873 - 2¹⁰ = 163537849 is a prime.

It is a super-2 number, since 2×163538873² = 53489925964220258, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (163538813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1994336 + ... + 1994417.

It is an arithmetic number, because the mean of its divisors is an integer number (41881917).

Almost surely, 2^163538873 is an apocalyptic number.

It is an amenable number.

163538873 is a deficient number, since it is larger than the sum of its proper divisors (3988795).

163538873 is an equidigital number, since it uses as much as digits as its factorization.

163538873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3988794.

The product of its digits is 362880, while the sum is 44.

The square root of 163538873 is about 12788.2318167916. The cubic root of 163538873 is about 546.8568630197.

The spelling of 163538873 in words is "one hundred sixty-three million, five hundred thirty-eight thousand, eight hundred seventy-three".