84204609 has 8 divisors (see below), whose sum is σ = 113384832. Its totient is φ = 55580400.

The previous prime is 84204607. The next prime is 84204647. The reversal of 84204609 is 90640248.

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

It is not a de Polignac number, because 84204609 - 2¹ = 84204607 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 84204609.

It is not an unprimeable number, because it can be changed into a prime (84204607) 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, 138649 + ... + 139254.

It is an arithmetic number, because the mean of its divisors is an integer number (14173104).

Almost surely, 2^84204609 is an apocalyptic number.

It is an amenable number.

84204609 is a deficient number, since it is larger than the sum of its proper divisors (29180223).

84204609 is a wasteful number, since it uses less digits than its factorization.

84204609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278007.

The product of its (nonzero) digits is 13824, while the sum is 33.

The square root of 84204609 is about 9176.3069368892. The cubic root of 84204609 is about 438.3072165458.

The spelling of 84204609 in words is "eighty-four million, two hundred four thousand, six hundred nine".