99658 has 8 divisors (see below), whose sum is σ = 161028. Its totient is φ = 45984.

The previous prime is 99643. The next prime is 99661. The reversal of 99658 is 85699.

It can be written as a sum of positive squares in 2 ways, for example, as 88209 + 11449 = 297^2 + 107^2 .

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

It is an unprimeable number.

99658 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1891 + ... + 1942.

2⁹⁹⁶⁵⁸ is an apocalyptic number.

99658 is a deficient number, since it is larger than the sum of its proper divisors (61370).

99658 is a wasteful number, since it uses less digits than its factorization.

99658 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3848.

The product of its digits is 19440, while the sum is 37.

The square root of 99658 is about 315.6865534038. The cubic root of 99658 is about 46.3629137865.

It can be divided in two parts, 99 and 658, that added together give a palindrome (757).

The spelling of 99658 in words is "ninety-nine thousand, six hundred fifty-eight".