80891433 has 16 divisors (see below), whose sum is σ = 136959360. Its totient is φ = 46223568.

The previous prime is 80891413. The next prime is 80891441. The reversal of 80891433 is 33419808.

It is not a de Polignac number, because 80891433 - 2⁹ = 80890921 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (80891413) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 213810 + ... + 214187.

It is an arithmetic number, because the mean of its divisors is an integer number (8559960).

Almost surely, 2^80891433 is an apocalyptic number.

It is an amenable number.

80891433 is a deficient number, since it is larger than the sum of its proper divisors (56067927).

80891433 is a wasteful number, since it uses less digits than its factorization.

80891433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 428013 (or 428007 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 80891433 is about 8993.9664775893. The cubic root of 80891433 is about 432.4814751441.

The spelling of 80891433 in words is "eighty million, eight hundred ninety-one thousand, four hundred thirty-three".