84573621 has 24 divisors (see below), whose sum is σ = 134656704. Its totient is φ = 50722560.

The previous prime is 84573613. The next prime is 84573649. The reversal of 84573621 is 12637548.

84573621 is a `hidden beast` number, since 84 + 573 + 6 + 2 + 1 = 666.

It is not a de Polignac number, because 84573621 - 2³ = 84573613 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84573661) 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, 5200 + ... + 14006.

It is an arithmetic number, because the mean of its divisors is an integer number (5610696).

Almost surely, 2^84573621 is an apocalyptic number.

It is an amenable number.

84573621 is a deficient number, since it is larger than the sum of its proper divisors (50083083).

84573621 is a wasteful number, since it uses less digits than its factorization.

84573621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8921 (or 8918 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 84573621 is about 9196.3917380677. The cubic root of 84573621 is about 438.9465518165.

The spelling of 84573621 in words is "eighty-four million, five hundred seventy-three thousand, six hundred twenty-one".