181960873 has 4 divisors (see below), whose sum is σ = 182383488. Its totient is φ = 181538260.

The previous prime is 181960841. The next prime is 181960879. The reversal of 181960873 is 378069181.

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 a cyclic number.

It is not a de Polignac number, because 181960873 - 2⁵ = 181960841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (181960879) 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 3 ways as a sum of consecutive naturals, for example, 210661 + ... + 211522.

It is an arithmetic number, because the mean of its divisors is an integer number (45595872).

Almost surely, 2^181960873 is an apocalyptic number.

It is an amenable number.

181960873 is a deficient number, since it is larger than the sum of its proper divisors (422615).

181960873 is an equidigital number, since it uses as much as digits as its factorization.

181960873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 422614.

The product of its (nonzero) digits is 72576, while the sum is 43.

The square root of 181960873 is about 13489.2873421838. The cubic root of 181960873 is about 566.6644971466.

The spelling of 181960873 in words is "one hundred eighty-one million, nine hundred sixty thousand, eight hundred seventy-three".