84099 has 12 divisors (see below), whose sum is σ = 120344. Its totient is φ = 52224.

The previous prime is 84089. The next prime is 84121. The reversal of 84099 is 99048.

It is a Cunningham number, because it is equal to 290²-1.

It is not a de Polignac number, because 84099 - 2⁵ = 84067 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84059) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 819 + ... + 915.

2⁸⁴⁰⁹⁹ is an apocalyptic number.

84099 is a deficient number, since it is larger than the sum of its proper divisors (36245).

84099 is a wasteful number, since it uses less digits than its factorization.

84099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134 (or 117 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 30.

The square root of 84099 is about 289.9982758569. The cubic root of 84099 is about 43.8123898979.

It can be divided in two parts, 840 and 99, that added together give a palindrome (939).

The spelling of 84099 in words is "eighty-four thousand, ninety-nine".