180883921 has 4 divisors (see below), whose sum is σ = 181103472. Its totient is φ = 180664372.

The previous prime is 180883889. The next prime is 180883949. The reversal of 180883921 is 129388081.

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, and also an emirpimes, since its reverse is a distinct semiprime: 129388081 = 19 ⋅6809899.

It is a cyclic number.

It is not a de Polignac number, because 180883921 - 2⁵ = 180883889 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (180883421) 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, 108535 + ... + 110188.

It is an arithmetic number, because the mean of its divisors is an integer number (45275868).

Almost surely, 2^180883921 is an apocalyptic number.

It is an amenable number.

180883921 is a deficient number, since it is larger than the sum of its proper divisors (219551).

180883921 is an equidigital number, since it uses as much as digits as its factorization.

180883921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219550.

The product of its (nonzero) digits is 27648, while the sum is 40.

The square root of 180883921 is about 13449.3093131209. The cubic root of 180883921 is about 565.5443324863.

The spelling of 180883921 in words is "one hundred eighty million, eight hundred eighty-three thousand, nine hundred twenty-one".