99958 has 16 divisors (see below), whose sum is σ = 163296. Its totient is φ = 45760.

The previous prime is 99929. The next prime is 99961. The reversal of 99958 is 85999.

It is a self number, because there is not a number n which added to its sum of digits gives 99958.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1860 + ... + 1912.

It is an arithmetic number, because the mean of its divisors is an integer number (10206).

2⁹⁹⁹⁵⁸ is an apocalyptic number.

99958 is a deficient number, since it is larger than the sum of its proper divisors (63338).

99958 is a wasteful number, since it uses less digits than its factorization.

99958 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119.

The product of its digits is 29160, while the sum is 40.

The square root of 99958 is about 316.1613512117. The cubic root of 99958 is about 46.4093892018.

The spelling of 99958 in words is "ninety-nine thousand, nine hundred fifty-eight".