84409 has 8 divisors (see below), whose sum is σ = 93632. Its totient is φ = 75600.

The previous prime is 84407. The next prime is 84421. The reversal of 84409 is 90448.

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 84409 - 2¹ = 84407 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84401) 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, 484 + ... + 634.

It is an arithmetic number, because the mean of its divisors is an integer number (11704).

2⁸⁴⁴⁰⁹ is an apocalyptic number.

It is an amenable number.

84409 is a deficient number, since it is larger than the sum of its proper divisors (9223).

84409 is a wasteful number, since it uses less digits than its factorization.

84409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207.

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 84409 is about 290.5322701526. The cubic root of 84409 is about 43.8661566363.

The spelling of 84409 in words is "eighty-four thousand, four hundred nine".