84636609 has 8 divisors (see below), whose sum is σ = 113541792. Its totient is φ = 56077920.

The previous prime is 84636589. The next prime is 84636623. The reversal of 84636609 is 90663648.

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

It is not a de Polignac number, because 84636609 - 2¹³ = 84628417 is a prime.

It is not an unprimeable number, because it can be changed into a prime (84636709) 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, 86052 + ... + 87029.

It is an arithmetic number, because the mean of its divisors is an integer number (14192724).

Almost surely, 2^84636609 is an apocalyptic number.

It is an amenable number.

84636609 is a deficient number, since it is larger than the sum of its proper divisors (28905183).

84636609 is a wasteful number, since it uses less digits than its factorization.

84636609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173247.

The product of its (nonzero) digits is 186624, while the sum is 42.

The square root of 84636609 is about 9199.8157046758. The cubic root of 84636609 is about 439.0554963629.

The spelling of 84636609 in words is "eighty-four million, six hundred thirty-six thousand, six hundred nine".