84285509 has 16 divisors (see below), whose sum is σ = 105432576. Its totient is φ = 65458800.

The previous prime is 84285503. The next prime is 84285521. The reversal of 84285509 is 90558248.

84285509 is nontrivially palindromic in base 8.

It is not a de Polignac number, because 84285509 - 2²⁴ = 67508293 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84285503) 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, 23834 + ... + 27140.

It is an arithmetic number, because the mean of its divisors is an integer number (6589536).

Almost surely, 2^84285509 is an apocalyptic number.

It is an amenable number.

84285509 is a deficient number, since it is larger than the sum of its proper divisors (21147067).

84285509 is a wasteful number, since it uses less digits than its factorization.

84285509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3656.

The product of its (nonzero) digits is 115200, while the sum is 41.

The square root of 84285509 is about 9180.7139700570. The cubic root of 84285509 is about 438.4475402347.

The spelling of 84285509 in words is "eighty-four million, two hundred eighty-five thousand, five hundred nine".