84064009 has 4 divisors (see below), whose sum is σ = 84108304. Its totient is φ = 84019716.

The previous prime is 84064007. The next prime is 84064027. The reversal of 84064009 is 90046048.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 84064009 - 2¹ = 84064007 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84064007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19167 + ... + 23140.

It is an arithmetic number, because the mean of its divisors is an integer number (21027076).

Almost surely, 2^84064009 is an apocalyptic number.

It is an amenable number.

84064009 is a deficient number, since it is larger than the sum of its proper divisors (44295).

84064009 is a wasteful number, since it uses less digits than its factorization.

84064009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44294.

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 84064009 is about 9168.6427021670. The cubic root of 84064009 is about 438.0631272690.

The spelling of 84064009 in words is "eighty-four million, sixty-four thousand, nine".