181002873 has 24 divisors (see below), whose sum is σ = 257482848. Its totient is φ = 113073408.

The previous prime is 181002863. The next prime is 181002889. The reversal of 181002873 is 378200181.

It is a happy number.

It is not a de Polignac number, because 181002873 - 2⁵ = 181002841 is a prime.

It is a super-3 number, since 3×181002873³ (a number of 26 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 181002873.

It is not an unprimeable number, because it can be changed into a prime (181002863) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 104190 + ... + 105912.

It is an arithmetic number, because the mean of its divisors is an integer number (10728452).

Almost surely, 2^181002873 is an apocalyptic number.

It is an amenable number.

181002873 is a deficient number, since it is larger than the sum of its proper divisors (76479975).

181002873 is a wasteful number, since it uses less digits than its factorization.

181002873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1861 (or 1842 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 30.

The square root of 181002873 is about 13453.7308208541. The cubic root of 181002873 is about 565.6682754879.

The spelling of 181002873 in words is "one hundred eighty-one million, two thousand, eight hundred seventy-three".