2099123 has 4 divisors (see below), whose sum is σ = 2260608. Its totient is φ = 1937640.

The previous prime is 2099093. The next prime is 2099129. The reversal of 2099123 is 3219902.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2099123 - 2⁶ = 2099059 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2099092 and 2099101.

It is not an unprimeable number, because it can be changed into a prime (2099129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80723 + ... + 80748.

It is an arithmetic number, because the mean of its divisors is an integer number (565152).

2^2099123 is an apocalyptic number.

2099123 is a deficient number, since it is larger than the sum of its proper divisors (161485).

2099123 is a wasteful number, since it uses less digits than its factorization.

2099123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161484.

The product of its (nonzero) digits is 972, while the sum is 26.

The square root of 2099123 is about 1448.8350492723. The cubic root of 2099123 is about 128.0400875416.

It can be divided in two parts, 2099 and 123, that added together give a palindrome (2222).

The spelling of 2099123 in words is "two million, ninety-nine thousand, one hundred twenty-three".