161877873 has 16 divisors (see below), whose sum is σ = 219098880. Its totient is φ = 106294656.

The previous prime is 161877857. The next prime is 161877899. The reversal of 161877873 is 378778161.

161877873 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 161877873 - 2⁴ = 161877857 is a prime.

It is not an unprimeable number, because it can be changed into a prime (161877803) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 188461 + ... + 189317.

It is an arithmetic number, because the mean of its divisors is an integer number (13693680).

Almost surely, 2^161877873 is an apocalyptic number.

It is an amenable number.

161877873 is a deficient number, since it is larger than the sum of its proper divisors (57221007).

161877873 is an equidigital number, since it uses as much as digits as its factorization.

161877873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1736.

The product of its digits is 395136, while the sum is 48.

The square root of 161877873 is about 12723.1235551652. The cubic root of 161877873 is about 544.9991560742. Note that the first 3 decimals are identical.

The spelling of 161877873 in words is "one hundred sixty-one million, eight hundred seventy-seven thousand, eight hundred seventy-three".