84491 has 4 divisors (see below), whose sum is σ = 92184. Its totient is φ = 76800.

The previous prime is 84481. The next prime is 84499. The reversal of 84491 is 19448.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-84491 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 84491.

It is not an unprimeable number, because it can be changed into a prime (84499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3830 + ... + 3851.

It is an arithmetic number, because the mean of its divisors is an integer number (23046).

2⁸⁴⁴⁹¹ is an apocalyptic number.

84491 is a deficient number, since it is larger than the sum of its proper divisors (7693).

84491 is a wasteful number, since it uses less digits than its factorization.

84491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7692.

The product of its digits is 1152, while the sum is 26.

The square root of 84491 is about 290.6733561921. The cubic root of 84491 is about 43.8803567835.

It can be divided in two parts, 84 and 491, that added together give a palindrome (575).

The spelling of 84491 in words is "eighty-four thousand, four hundred ninety-one".