84487 has 8 divisors (see below), whose sum is σ = 93296. Its totient is φ = 76032.

The previous prime is 84481. The next prime is 84499. The reversal of 84487 is 78448.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 84487 - 2¹⁵ = 51719 is a prime.

It is a Duffinian number.

84487 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84481) 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 7 ways as a sum of consecutive naturals, for example, 823 + ... + 919.

It is an arithmetic number, because the mean of its divisors is an integer number (11662).

2⁸⁴⁴⁸⁷ is an apocalyptic number.

84487 is a deficient number, since it is larger than the sum of its proper divisors (8809).

84487 is a wasteful number, since it uses less digits than its factorization.

84487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177.

The product of its digits is 7168, while the sum is 31.

The square root of 84487 is about 290.6664755351. Note that the first 3 decimals coincide. The cubic root of 84487 is about 43.8796643066.

The spelling of 84487 in words is "eighty-four thousand, four hundred eighty-seven".