163785873 has 4 divisors (see below), whose sum is σ = 218381168. Its totient is φ = 109190580.

The previous prime is 163785859. The next prime is 163785887. The reversal of 163785873 is 378587361.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (163785859) and next prime (163785887).

It is not a de Polignac number, because 163785873 - 2⁵ = 163785841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (163785893) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27297643 + ... + 27297648.

It is an arithmetic number, because the mean of its divisors is an integer number (54595292).

Almost surely, 2^163785873 is an apocalyptic number.

It is an amenable number.

163785873 is a deficient number, since it is larger than the sum of its proper divisors (54595295).

163785873 is an equidigital number, since it uses as much as digits as its factorization.

163785873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54595294.

The product of its digits is 846720, while the sum is 48.

The square root of 163785873 is about 12797.8854894080. The cubic root of 163785873 is about 547.1320385730.

The spelling of 163785873 in words is "one hundred sixty-three million, seven hundred eighty-five thousand, eight hundred seventy-three".