2123863 has 4 divisors (see below), whose sum is σ = 2427280. Its totient is φ = 1820448.

The previous prime is 2123851. The next prime is 2123867. The reversal of 2123863 is 3683212.

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

It is not a de Polignac number, because 2123863 - 2⁵ = 2123831 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2123867) 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, 151698 + ... + 151711.

It is an arithmetic number, because the mean of its divisors is an integer number (606820).

2^2123863 is an apocalyptic number.

2123863 is a deficient number, since it is larger than the sum of its proper divisors (303417).

2123863 is an equidigital number, since it uses as much as digits as its factorization.

2123863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 303416.

The product of its digits is 1728, while the sum is 25.

The square root of 2123863 is about 1457.3479337481. The cubic root of 2123863 is about 128.5411456604.

The spelling of 2123863 in words is "two million, one hundred twenty-three thousand, eight hundred sixty-three".