84813621 has 16 divisors (see below), whose sum is σ = 117184320. Its totient is φ = 54529280.

The previous prime is 84813611. The next prime is 84813623. The reversal of 84813621 is 12631848.

It is a cyclic number.

It is not a de Polignac number, because 84813621 - 2⁶ = 84813557 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84813623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4861 + ... + 13901.

It is an arithmetic number, because the mean of its divisors is an integer number (7324020).

Almost surely, 2^84813621 is an apocalyptic number.

It is an amenable number.

84813621 is a deficient number, since it is larger than the sum of its proper divisors (32370699).

84813621 is a wasteful number, since it uses less digits than its factorization.

84813621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9156.

The product of its digits is 9216, while the sum is 33.

The square root of 84813621 is about 9209.4310899208. The cubic root of 84813621 is about 439.3613686268.

The spelling of 84813621 in words is "eighty-four million, eight hundred thirteen thousand, six hundred twenty-one".