2099823 has 32 divisors (see below), whose sum is σ = 3421440. Its totient is φ = 1128960.

The previous prime is 2099821. The next prime is 2099827. The reversal of 2099823 is 3289902.

It is not a de Polignac number, because 2099823 - 2¹ = 2099821 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2099821) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10561 + ... + 10757.

It is an arithmetic number, because the mean of its divisors is an integer number (106920).

2^2099823 is an apocalyptic number.

2099823 is a deficient number, since it is larger than the sum of its proper divisors (1321617).

2099823 is a wasteful number, since it uses less digits than its factorization.

2099823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247.

The product of its (nonzero) digits is 7776, while the sum is 33.

The square root of 2099823 is about 1449.0766025300. The cubic root of 2099823 is about 128.0543185800.

The spelling of 2099823 in words is "two million, ninety-nine thousand, eight hundred twenty-three".