84679 has 4 divisors (see below), whose sum is σ = 96784. Its totient is φ = 72576.

The previous prime is 84673. The next prime is 84691. The reversal of 84679 is 97648.

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

It is not a de Polignac number, because 84679 - 2⁷ = 84551 is a prime.

It is a Duffinian number.

84679 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84673) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6042 + ... + 6055.

It is an arithmetic number, because the mean of its divisors is an integer number (24196).

2⁸⁴⁶⁷⁹ is an apocalyptic number.

84679 is a deficient number, since it is larger than the sum of its proper divisors (12105).

84679 is a wasteful number, since it uses less digits than its factorization.

84679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12104.

The product of its digits is 12096, while the sum is 34.

The square root of 84679 is about 290.9965635536. The cubic root of 84679 is about 43.9128785748.

The spelling of 84679 in words is "eighty-four thousand, six hundred seventy-nine".