99999558 has 24 divisors (see below), whose sum is σ = 216858096. Its totient is φ = 33303600.

The previous prime is 99999551. The next prime is 99999563. The reversal of 99999558 is 85599999.

It is a junction number, because it is equal to n+sod(n) for n = 99999495 and 99999504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99999551) 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, 29743 + ... + 32933.

It is an arithmetic number, because the mean of its divisors is an integer number (9035754).

Almost surely, 2^99999558 is an apocalyptic number.

99999558 is an abundant number, since it is smaller than the sum of its proper divisors (116858538).

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

99999558 is a wasteful number, since it uses less digits than its factorization.

99999558 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4940 (or 4937 counting only the distinct ones).

The product of its digits is 11809800, while the sum is 63.

The square root of 99999558 is about 9999.9778999756. The cubic root of 99999558 is about 464.1581994995.

The spelling of 99999558 in words is "ninety-nine million, nine hundred ninety-nine thousand, five hundred fifty-eight".