99856 has 15 divisors (see below), whose sum is σ = 195951. Its totient is φ = 49296.

The previous prime is 99839. The next prime is 99859. The reversal of 99856 is 65899.

99856 = T₃₉ + T₄₀ + ... + T₈₆.

The square root of 99856 is 316.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

Its product of digits (19440) is a multiple of the sum of its prime divisors (81).

It is not an unprimeable number, because it can be changed into a prime (99859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1225 + ... + 1303.

2⁹⁹⁸⁵⁶ is an apocalyptic number.

99856 is the 316-th square number.

It is an amenable number.

99856 is a deficient number, since it is larger than the sum of its proper divisors (96095).

99856 is an equidigital number, since it uses as much as digits as its factorization.

99856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166 (or 81 counting only the distinct ones).

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

The cubic root of 99856 is about 46.3935980069.

The spelling of 99856 in words is "ninety-nine thousand, eight hundred fifty-six".