84064591 has 16 divisors (see below), whose sum is σ = 96687360. Its totient is φ = 72495360.

The previous prime is 84064579. The next prime is 84064619. The reversal of 84064591 is 19546048.

It is a happy number.

It is not a de Polignac number, because 84064591 - 2¹¹ = 84062543 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 84064591.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84064501) 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, 8091 + ... + 15283.

It is an arithmetic number, because the mean of its divisors is an integer number (6042960).

Almost surely, 2^84064591 is an apocalyptic number.

84064591 is a deficient number, since it is larger than the sum of its proper divisors (12622769).

84064591 is a wasteful number, since it uses less digits than its factorization.

84064591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7266.

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 84064591 is about 9168.6744407248. The cubic root of 84064591 is about 438.0641382135.

The spelling of 84064591 in words is "eighty-four million, sixty-four thousand, five hundred ninety-one".