84705 has 8 divisors (see below), whose sum is σ = 135552. Its totient is φ = 45168.

The previous prime is 84701. The next prime is 84713. The reversal of 84705 is 50748.

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

It is not a de Polignac number, because 84705 - 2² = 84701 is a prime.

It is not an unprimeable number, because it can be changed into a prime (84701) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2809 + ... + 2838.

It is an arithmetic number, because the mean of its divisors is an integer number (16944).

2⁸⁴⁷⁰⁵ is an apocalyptic number.

It is an amenable number.

84705 is a deficient number, since it is larger than the sum of its proper divisors (50847).

84705 is a wasteful number, since it uses less digits than its factorization.

84705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5655.

The product of its (nonzero) digits is 1120, while the sum is 24.

The square root of 84705 is about 291.0412341920. The cubic root of 84705 is about 43.9173724793.

Subtracting from 84705 its sum of digits (24), we obtain a square (84681 = 291²).

The spelling of 84705 in words is "eighty-four thousand, seven hundred five".