84684591 has 12 divisors (see below), whose sum is σ = 126268480. Its totient is φ = 54635040.

The previous prime is 84684581. The next prime is 84684623. The reversal of 84684591 is 19548648.

It is not a de Polignac number, because 84684591 - 2¹⁷ = 84553519 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84684541) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 151486 + ... + 152043.

Almost surely, 2^84684591 is an apocalyptic number.

84684591 is a deficient number, since it is larger than the sum of its proper divisors (41583889).

84684591 is a wasteful number, since it uses less digits than its factorization.

84684591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 303566 (or 303563 counting only the distinct ones).

The product of its digits is 276480, while the sum is 45.

The square root of 84684591 is about 9202.4231048132. The cubic root of 84684591 is about 439.1384501473.

The spelling of 84684591 in words is "eighty-four million, six hundred eighty-four thousand, five hundred ninety-one".