84999 has 8 divisors (see below), whose sum is σ = 117360. Its totient is φ = 54656.

The previous prime is 84991. The next prime is 85009. The reversal of 84999 is 99948.

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 84999 - 2³ = 84991 is a prime.

84999 is a modest number, since divided by 999 gives 84 as remainder.

84999 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84991) 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, 402 + ... + 575.

It is an arithmetic number, because the mean of its divisors is an integer number (14670).

2⁸⁴⁹⁹⁹ is an apocalyptic number.

84999 is a deficient number, since it is larger than the sum of its proper divisors (32361).

84999 is a wasteful number, since it uses less digits than its factorization.

84999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1009.

The product of its digits is 23328, while the sum is 39.

The square root of 84999 is about 291.5458797514. The cubic root of 84999 is about 43.9681242962.

The spelling of 84999 in words is "eighty-four thousand, nine hundred ninety-nine".