2099723 has 4 divisors (see below), whose sum is σ = 2167488. Its totient is φ = 2031960.

The previous prime is 2099717. The next prime is 2099731. The reversal of 2099723 is 3279902.

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 2099723 - 2⁴ = 2099707 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2099723.

It is not an unprimeable number, because it can be changed into a prime (2099743) 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, 33836 + ... + 33897.

It is an arithmetic number, because the mean of its divisors is an integer number (541872).

2^2099723 is an apocalyptic number.

2099723 is a deficient number, since it is larger than the sum of its proper divisors (67765).

2099723 is an equidigital number, since it uses as much as digits as its factorization.

2099723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67764.

The product of its (nonzero) digits is 6804, while the sum is 32.

The square root of 2099723 is about 1449.0420973871. The cubic root of 2099723 is about 128.0522857682.

The spelling of 2099723 in words is "two million, ninety-nine thousand, seven hundred twenty-three".