181023873 has 8 divisors (see below), whose sum is σ = 241987200. Its totient is φ = 120371568.

The previous prime is 181023847. The next prime is 181023881. The reversal of 181023873 is 378320181.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 181023873 - 2⁵ = 181023841 is a prime.

It is not an unprimeable number, because it can be changed into a prime (181023833) 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 7 ways as a sum of consecutive naturals, for example, 76393 + ... + 78726.

It is an arithmetic number, because the mean of its divisors is an integer number (30248400).

Almost surely, 2^181023873 is an apocalyptic number.

It is an amenable number.

181023873 is a deficient number, since it is larger than the sum of its proper divisors (60963327).

181023873 is a wasteful number, since it uses less digits than its factorization.

181023873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155511.

The product of its (nonzero) digits is 8064, while the sum is 33.

The square root of 181023873 is about 13454.5112508779. The cubic root of 181023873 is about 565.6901509683.

The spelling of 181023873 in words is "one hundred eighty-one million, twenty-three thousand, eight hundred seventy-three".