80891189 has 16 divisors (see below), whose sum is σ = 86856000. Its totient is φ = 75116160.

The previous prime is 80891149. The next prime is 80891191. The reversal of 80891189 is 98119808.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 80891189 - 2⁸ = 80890933 is a prime.

It is a Smith number, since the sum of its digits (44) 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 a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80891119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 287729 + ... + 288009.

It is an arithmetic number, because the mean of its divisors is an integer number (5428500).

Almost surely, 2^80891189 is an apocalyptic number.

It is an amenable number.

80891189 is a deficient number, since it is larger than the sum of its proper divisors (5964811).

80891189 is a wasteful number, since it uses less digits than its factorization.

80891189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 548.

The product of its (nonzero) digits is 41472, while the sum is 44.

The square root of 80891189 is about 8993.9529129299. The cubic root of 80891189 is about 432.4810402995.

The spelling of 80891189 in words is "eighty million, eight hundred ninety-one thousand, one hundred eighty-nine".