84059209 has 8 divisors (see below), whose sum is σ = 90729800. Its totient is φ = 77417856.

The previous prime is 84059161. The next prime is 84059221. The reversal of 84059209 is 90295048.

It can be written as a sum of positive squares in 4 ways, for example, as 32262400 + 51796809 = 5680^2 + 7197^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 84059209 - 2¹¹ = 84057161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84059809) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1134 + ... + 13015.

It is an arithmetic number, because the mean of its divisors is an integer number (11341225).

Almost surely, 2^84059209 is an apocalyptic number.

It is an amenable number.

84059209 is a deficient number, since it is larger than the sum of its proper divisors (6670591).

84059209 is a wasteful number, since it uses less digits than its factorization.

84059209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14619.

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 84059209 is about 9168.3809366758. The cubic root of 84059209 is about 438.0547894042.

The spelling of 84059209 in words is "eighty-four million, fifty-nine thousand, two hundred nine".