99039 has 4 divisors (see below), whose sum is σ = 132056. Its totient is φ = 66024.

The previous prime is 99023. The next prime is 99041. The reversal of 99039 is 93099.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93099 = 3 ⋅31033.

It is not a de Polignac number, because 99039 - 2⁴ = 99023 is a prime.

It is a D-number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 98997 and 99015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99079) 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, 16504 + ... + 16509.

It is an arithmetic number, because the mean of its divisors is an integer number (33014).

2⁹⁹⁰³⁹ is an apocalyptic number.

99039 is a deficient number, since it is larger than the sum of its proper divisors (33017).

99039 is a wasteful number, since it uses less digits than its factorization.

99039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33016.

The product of its (nonzero) digits is 2187, while the sum is 30.

The square root of 99039 is about 314.7046234169. The cubic root of 99039 is about 46.2667239251.

The spelling of 99039 in words is "ninety-nine thousand, thirty-nine".