84709 has 8 divisors (see below), whose sum is σ = 92160. Its totient is φ = 77616.

The previous prime is 84701. The next prime is 84713. The reversal of 84709 is 90748.

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 84709 - 2³ = 84701 is a prime.

It is a super-2 number, since 2×84709² = 14351229362, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

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, 604 + ... + 730.

It is an arithmetic number, because the mean of its divisors is an integer number (11520).

2⁸⁴⁷⁰⁹ is an apocalyptic number.

It is an amenable number.

84709 is a deficient number, since it is larger than the sum of its proper divisors (7451).

84709 is a wasteful number, since it uses less digits than its factorization.

84709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179.

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 84709 is about 291.0481059894. The cubic root of 84709 is about 43.9180637676.

Subtracting from 84709 its sum of digits (28), we obtain a square (84681 = 291²).

The spelling of 84709 in words is "eighty-four thousand, seven hundred nine".