99984 has 20 divisors (see below), whose sum is σ = 258416. Its totient is φ = 33312.

The previous prime is 99971. The next prime is 99989. The reversal of 99984 is 48999.

It is a nialpdrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (99989) by changing a digit.

99984 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 994 + ... + 1089.

2⁹⁹⁹⁸⁴ is an apocalyptic number.

It is an amenable number.

99984 is an abundant number, since it is smaller than the sum of its proper divisors (158432).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (129208).

99984 is a wasteful number, since it uses less digits than its factorization.

99984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2094 (or 2088 counting only the distinct ones).

The product of its digits is 23328, while the sum is 39.

The square root of 99984 is about 316.2024667835. The cubic root of 99984 is about 46.4134126900.

The spelling of 99984 in words is "ninety-nine thousand, nine hundred eighty-four".