80109921 has 24 divisors (see below), whose sum is σ = 113503872. Its totient is φ = 50220000.

The previous prime is 80109917. The next prime is 80109929. The reversal of 80109921 is 12990108.

It is not a de Polignac number, because 80109921 - 2² = 80109917 is a prime.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (80109929) 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 23 ways as a sum of consecutive naturals, for example, 106296 + ... + 107046.

It is an arithmetic number, because the mean of its divisors is an integer number (4729328).

Almost surely, 2^80109921 is an apocalyptic number.

It is an amenable number.

80109921 is a deficient number, since it is larger than the sum of its proper divisors (33393951).

80109921 is a wasteful number, since it uses less digits than its factorization.

80109921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 853 (or 822 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 30.

The square root of 80109921 is about 8950.4145714039. The cubic root of 80109921 is about 431.0841957021.

The spelling of 80109921 in words is "eighty million, one hundred nine thousand, nine hundred twenty-one".