84859 has 2 divisors, whose sum is σ = 84860. Its totient is φ = 84858.

The previous prime is 84857. The next prime is 84869. The reversal of 84859 is 95848.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 84859 - 2¹ = 84857 is a prime.

Together with 84857, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (84857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42429 + 42430.

It is an arithmetic number, because the mean of its divisors is an integer number (42430).

2⁸⁴⁸⁵⁹ is an apocalyptic number.

84859 is a deficient number, since it is larger than the sum of its proper divisors (1).

84859 is an equidigital number, since it uses as much as digits as its factorization.

84859 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11520, while the sum is 34.

The square root of 84859 is about 291.3056813727. The cubic root of 84859 is about 43.9439713844.

The spelling of 84859 in words is "eighty-four thousand, eight hundred fifty-nine".