2105723 has 4 divisors (see below), whose sum is σ = 2108688. Its totient is φ = 2102760.

The previous prime is 2105717. The next prime is 2105729. The reversal of 2105723 is 3275012.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is an interprime number because it is at equal distance from previous prime (2105717) and next prime (2105729).

It is a cyclic number.

It is not a de Polignac number, because 2105723 - 2¹⁰ = 2104699 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2105695 and 2105704.

It is not an unprimeable number, because it can be changed into a prime (2105729) 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, 290 + ... + 2072.

It is an arithmetic number, because the mean of its divisors is an integer number (527172).

2^2105723 is an apocalyptic number.

2105723 is a deficient number, since it is larger than the sum of its proper divisors (2965).

2105723 is a wasteful number, since it uses less digits than its factorization.

2105723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2964.

The product of its (nonzero) digits is 420, while the sum is 20.

The square root of 2105723 is about 1451.1109537179. The cubic root of 2105723 is about 128.1741404208.

The spelling of 2105723 in words is "two million, one hundred five thousand, seven hundred twenty-three".