2099 has 2 divisors, whose sum is σ = 2100.
Its totient is φ = 2098.
The previous prime is 2089. The next prime is 2111. The reversal of 2099 is 9902.
It is a weak prime.
It is a cyclic number.
It is not a de Polignac number, because 2099 - 24 = 2083 is a prime.
It is a Chen prime.
2099 is a modest number, since divided by 99 gives 20 as remainder.
It is a plaindrome in base 12.
It is a nialpdrome in base 16.
It is a self number, because there is not a number n which added to its sum of digits gives 2099.
It is not a weakly prime, because it can be changed into another prime (2029) 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 as a sum of consecutive naturals, namely, 1049 + 1050.
It is an arithmetic number, because the mean of its divisors is an integer number (1050).
22099 is an apocalyptic number.
2099 is a deficient number, since it is larger than the sum of its proper divisors (1).
2099 is an equidigital number, since it uses as much as digits as its factorization.
2099 is an odious number, because the sum of its binary digits is odd.
The product of its (nonzero) digits is 162, while the sum is 20.
The square root of 2099 is about 45.8148447558.
The cubic root of 2099 is about 12.8037586618.
It can be divided in two parts, 209 and 9, that multiplied together give a palindrome (1881).
The spelling of 2099 in words is "two thousand, ninety-nine".