84485809 has 4 divisors (see below), whose sum is σ = 85275504. Its totient is φ = 83696116.

The previous prime is 84485771. The next prime is 84485813. The reversal of 84485809 is 90858448.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 84485809 - 2¹⁵ = 84453041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84485209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 394687 + ... + 394900.

It is an arithmetic number, because the mean of its divisors is an integer number (21318876).

Almost surely, 2^84485809 is an apocalyptic number.

It is an amenable number.

84485809 is a deficient number, since it is larger than the sum of its proper divisors (789695).

84485809 is a wasteful number, since it uses less digits than its factorization.

84485809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 789694.

The product of its (nonzero) digits is 368640, while the sum is 46.

The square root of 84485809 is about 9191.6162343736. The cubic root of 84485809 is about 438.7945811741.

The spelling of 84485809 in words is "eighty-four million, four hundred eighty-five thousand, eight hundred nine".