84364521 has 16 divisors (see below), whose sum is σ = 113836800. Its totient is φ = 55572048.

The previous prime is 84364517. The next prime is 84364531. The reversal of 84364521 is 12546348.

It is not a de Polignac number, because 84364521 - 2² = 84364517 is a prime.

It is not an unprimeable number, because it can be changed into a prime (84364531) 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, 127690 + ... + 128348.

It is an arithmetic number, because the mean of its divisors is an integer number (7114800).

Almost surely, 2^84364521 is an apocalyptic number.

It is an amenable number.

84364521 is a deficient number, since it is larger than the sum of its proper divisors (29472279).

84364521 is a wasteful number, since it uses less digits than its factorization.

84364521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1108.

The product of its digits is 23040, while the sum is 33.

The square root of 84364521 is about 9185.0161132140. The cubic root of 84364521 is about 438.5845024798.

The spelling of 84364521 in words is "eighty-four million, three hundred sixty-four thousand, five hundred twenty-one".