84506009 has 16 divisors (see below), whose sum is σ = 98824320. Its totient is φ = 70761600.

The previous prime is 84505999. The next prime is 84506011. The reversal of 84506009 is 90060548.

It is a de Polignac number, because none of the positive numbers 2^k-84506009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (84506069) 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 15 ways as a sum of consecutive naturals, for example, 140309 + ... + 140909.

It is an arithmetic number, because the mean of its divisors is an integer number (6176520).

Almost surely, 2^84506009 is an apocalyptic number.

It is an amenable number.

84506009 is a deficient number, since it is larger than the sum of its proper divisors (14318311).

84506009 is a wasteful number, since it uses less digits than its factorization.

84506009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1040.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 84506009 is about 9192.7149961260. The cubic root of 84506009 is about 438.8295493513.

The spelling of 84506009 in words is "eighty-four million, five hundred six thousand, nine".