2123873 has 4 divisors (see below), whose sum is σ = 2197140. Its totient is φ = 2050608.

The previous prime is 2123867. The next prime is 2123879. The reversal of 2123873 is 3783212.

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

It is an interprime number because it is at equal distance from previous prime (2123867) and next prime (2123879).

It can be written as a sum of positive squares in 2 ways, for example, as 1067089 + 1056784 = 1033^2 + 1028^2 .

It is a cyclic number.

It is not a de Polignac number, because 2123873 - 2⁸ = 2123617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2123879) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36590 + ... + 36647.

It is an arithmetic number, because the mean of its divisors is an integer number (549285).

2^2123873 is an apocalyptic number.

It is an amenable number.

2123873 is a deficient number, since it is larger than the sum of its proper divisors (73267).

2123873 is an equidigital number, since it uses as much as digits as its factorization.

2123873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73266.

The product of its digits is 2016, while the sum is 26.

The square root of 2123873 is about 1457.3513646338. The cubic root of 2123873 is about 128.5413474012.

The spelling of 2123873 in words is "two million, one hundred twenty-three thousand, eight hundred seventy-three".