99558 has 12 divisors (see below), whose sum is σ = 215748. Its totient is φ = 33180.

The previous prime is 99551. The next prime is 99559. The reversal of 99558 is 85599.

It is a plaindrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99551) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2748 + ... + 2783.

It is an arithmetic number, because the mean of its divisors is an integer number (17979).

2⁹⁹⁵⁵⁸ is an apocalyptic number.

99558 is an abundant number, since it is smaller than the sum of its proper divisors (116190).

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

99558 is a wasteful number, since it uses less digits than its factorization.

99558 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5539 (or 5536 counting only the distinct ones).

The product of its digits is 16200, while the sum is 36.

The square root of 99558 is about 315.5281286985. The cubic root of 99558 is about 46.3474012570.

The spelling of 99558 in words is "ninety-nine thousand, five hundred fifty-eight".