99605 has 8 divisors (see below), whose sum is σ = 130464. Its totient is φ = 72400.

The previous prime is 99581. The next prime is 99607. The reversal of 99605 is 50699.

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

It is not a de Polignac number, because 99605 - 2⁸ = 99349 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99607) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 851 + ... + 960.

It is an arithmetic number, because the mean of its divisors is an integer number (16308).

2⁹⁹⁶⁰⁵ is an apocalyptic number.

It is an amenable number.

99605 is a deficient number, since it is larger than the sum of its proper divisors (30859).

99605 is a wasteful number, since it uses less digits than its factorization.

99605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1827.

The product of its (nonzero) digits is 2430, while the sum is 29.

The square root of 99605 is about 315.6025982149. The cubic root of 99605 is about 46.3546934390.

It can be divided in two parts, 99 and 605, that multiplied together give a palindrome (59895).

The spelling of 99605 in words is "ninety-nine thousand, six hundred five".