80874921 has 16 divisors (see below), whose sum is σ = 110419200. Its totient is φ = 52629888.

The previous prime is 80874917. The next prime is 80874931. The reversal of 80874921 is 12947808.

It is not a de Polignac number, because 80874921 - 2² = 80874917 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 80874921.

It is not an unprimeable number, because it can be changed into a prime (80874901) 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, 99565 + ... + 100373.

It is an arithmetic number, because the mean of its divisors is an integer number (6901200).

Almost surely, 2^80874921 is an apocalyptic number.

It is an amenable number.

80874921 is a deficient number, since it is larger than the sum of its proper divisors (29544279).

80874921 is a wasteful number, since it uses less digits than its factorization.

80874921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1568.

The product of its (nonzero) digits is 32256, while the sum is 39.

The square root of 80874921 is about 8993.0484820221. The cubic root of 80874921 is about 432.4520463166.

The spelling of 80874921 in words is "eighty million, eight hundred seventy-four thousand, nine hundred twenty-one".