2123803 has 4 divisors (see below), whose sum is σ = 2316888. Its totient is φ = 1930720.

The previous prime is 2123791. The next prime is 2123831. The reversal of 2123803 is 3083212.

It is a happy number.

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

It is a de Polignac number, because none of the positive numbers 2^k-2123803 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2123203) 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, 96526 + ... + 96547.

It is an arithmetic number, because the mean of its divisors is an integer number (579222).

2^2123803 is an apocalyptic number.

2123803 is a deficient number, since it is larger than the sum of its proper divisors (193085).

2123803 is a wasteful number, since it uses less digits than its factorization.

2123803 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193084.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 2123803 is about 1457.3273482646. The cubic root of 2123803 is about 128.5399352023.

It can be divided in two parts, 2123 and 803, that added together give a triangular number (2926 = T₇₆).

The spelling of 2123803 in words is "two million, one hundred twenty-three thousand, eight hundred three".