84684491 has 4 divisors (see below), whose sum is σ = 84710592. Its totient is φ = 84658392.

The previous prime is 84684461. The next prime is 84684493. The reversal of 84684491 is 19448648.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 84684491 - 2⁶ = 84684427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84684493) 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 3 ways as a sum of consecutive naturals, for example, 7355 + ... + 14948.

It is an arithmetic number, because the mean of its divisors is an integer number (21177648).

Almost surely, 2^84684491 is an apocalyptic number.

84684491 is a deficient number, since it is larger than the sum of its proper divisors (26101).

84684491 is a wasteful number, since it uses less digits than its factorization.

84684491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26100.

The product of its digits is 221184, while the sum is 44.

The square root of 84684491 is about 9202.4176714600. The cubic root of 84684491 is about 439.1382772947.

The spelling of 84684491 in words is "eighty-four million, six hundred eighty-four thousand, four hundred ninety-one".