2173863 has 4 divisors (see below), whose sum is σ = 2898488. Its totient is φ = 1449240.

The previous prime is 2173819. The next prime is 2173877. The reversal of 2173863 is 3683712.

2173863 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 2173863 - 2¹⁰ = 2172839 is a prime.

It is a D-number.

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 2173863.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2173883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 362308 + ... + 362313.

It is an arithmetic number, because the mean of its divisors is an integer number (724622).

2^2173863 is an apocalyptic number.

2173863 is a deficient number, since it is larger than the sum of its proper divisors (724625).

2173863 is an equidigital number, since it uses as much as digits as its factorization.

2173863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 724624.

The product of its digits is 6048, while the sum is 30.

The square root of 2173863 is about 1474.4025908822. The cubic root of 2173863 is about 129.5420375047.

The spelling of 2173863 in words is "two million, one hundred seventy-three thousand, eight hundred sixty-three".