2123923 has 4 divisors (see below), whose sum is σ = 2175768. Its totient is φ = 2072080.

The previous prime is 2123917. The next prime is 2123939. The reversal of 2123923 is 3293212.

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 2123923 - 2⁹ = 2123411 is a prime.

It is a super-2 number, since 2×2123923² = 9022097819858, which contains 22 as substring.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2123894 and 2123903.

It is not an unprimeable number, because it can be changed into a prime (2123983) 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, 25861 + ... + 25942.

It is an arithmetic number, because the mean of its divisors is an integer number (543942).

2^2123923 is an apocalyptic number.

2123923 is a deficient number, since it is larger than the sum of its proper divisors (51845).

2123923 is an equidigital number, since it uses as much as digits as its factorization.

2123923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51844.

The product of its digits is 648, while the sum is 22.

The square root of 2123923 is about 1457.3685189409. The cubic root of 2123923 is about 128.5423560957.

The spelling of 2123923 in words is "two million, one hundred twenty-three thousand, nine hundred twenty-three".