84876021 has 24 divisors (see below), whose sum is σ = 130029120. Its totient is φ = 53199936.

The previous prime is 84875993. The next prime is 84876037. The reversal of 84876021 is 12067848.

84876021 is a `hidden beast` number, since 8 + 48 + 7 + 602 + 1 = 666.

It is not a de Polignac number, because 84876021 - 2²¹ = 82778869 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84876521) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21616 + ... + 25238.

It is an arithmetic number, because the mean of its divisors is an integer number (5417880).

Almost surely, 2^84876021 is an apocalyptic number.

It is an amenable number.

84876021 is a deficient number, since it is larger than the sum of its proper divisors (45153099).

84876021 is a wasteful number, since it uses less digits than its factorization.

84876021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3785 (or 3782 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The square root of 84876021 is about 9212.8182984362. The cubic root of 84876021 is about 439.4690927879.

The spelling of 84876021 in words is "eighty-four million, eight hundred seventy-six thousand, twenty-one".