99489 has 8 divisors (see below), whose sum is σ = 142912. Its totient is φ = 61200.

The previous prime is 99487. The next prime is 99497. The reversal of 99489 is 98499.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 99489 - 2¹ = 99487 is a prime.

It is a super-2 number, since 2×99489² = 19796122242, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39), and also a Moran number because the ratio is a prime number: 2551 = 99489 / (9 + 9 + 4 + 8 + 9).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99487) 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, 1237 + ... + 1314.

It is an arithmetic number, because the mean of its divisors is an integer number (17864).

2⁹⁹⁴⁸⁹ is an apocalyptic number.

It is an amenable number.

99489 is a deficient number, since it is larger than the sum of its proper divisors (43423).

99489 is a wasteful number, since it uses less digits than its factorization.

99489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2567.

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

The square root of 99489 is about 315.4187692576. The cubic root of 99489 is about 46.3366915542.

Subtracting from 99489 its reverse (98499), we obtain a triangular number (990 = T₄₄).

The spelling of 99489 in words is "ninety-nine thousand, four hundred eighty-nine".