2013823 has 4 divisors (see below), whose sum is σ = 2301520. Its totient is φ = 1726128.

The previous prime is 2013821. The next prime is 2013833. The reversal of 2013823 is 3283102.

It is a happy number.

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 2013823 - 2¹ = 2013821 is a prime.

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 2013823.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2013821) 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, 143838 + ... + 143851.

It is an arithmetic number, because the mean of its divisors is an integer number (575380).

2^2013823 is an apocalyptic number.

2013823 is a deficient number, since it is larger than the sum of its proper divisors (287697).

2013823 is an equidigital number, since it uses as much as digits as its factorization.

2013823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287696.

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

The square root of 2013823 is about 1419.0923155313. The cubic root of 2013823 is about 126.2817036349.

Adding to 2013823 its reverse (3283102), we get a palindrome (5296925).

The spelling of 2013823 in words is "two million, thirteen thousand, eight hundred twenty-three".