84565209 has 8 divisors (see below), whose sum is σ = 112803040. Its totient is φ = 56352096.

The previous prime is 84565199. The next prime is 84565223. The reversal of 84565209 is 90256548.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 84565209 - 2⁴ = 84565193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84565289) 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 7 ways as a sum of consecutive naturals, for example, 4389 + ... + 13725.

It is an arithmetic number, because the mean of its divisors is an integer number (14100380).

Almost surely, 2^84565209 is an apocalyptic number.

It is an amenable number.

84565209 is a deficient number, since it is larger than the sum of its proper divisors (28237831).

84565209 is a wasteful number, since it uses less digits than its factorization.

84565209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12359.

The product of its (nonzero) digits is 86400, while the sum is 39.

The square root of 84565209 is about 9195.9343734065. The cubic root of 84565209 is about 438.9319982603.

The spelling of 84565209 in words is "eighty-four million, five hundred sixty-five thousand, two hundred nine".