2104813 has 4 divisors (see below), whose sum is σ = 2110108. Its totient is φ = 2099520.

The previous prime is 2104811. The next prime is 2104841. The reversal of 2104813 is 3184012.

2104813 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 can be written as a sum of positive squares in 2 ways, for example, as 1108809 + 996004 = 1053^2 + 998^2 .

It is a cyclic number.

It is not a de Polignac number, because 2104813 - 2¹ = 2104811 is a prime.

It is a Duffinian number.

2104813 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2104811) 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, 1998 + ... + 2863.

It is an arithmetic number, because the mean of its divisors is an integer number (527527).

2^2104813 is an apocalyptic number.

It is an amenable number.

2104813 is a deficient number, since it is larger than the sum of its proper divisors (5295).

2104813 is an equidigital number, since it uses as much as digits as its factorization.

2104813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5294.

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 2104813 is about 1450.7973669676. The cubic root of 2104813 is about 128.1556740360.

Adding to 2104813 its reverse (3184012), we get a palindrome (5288825).

The spelling of 2104813 in words is "two million, one hundred four thousand, eight hundred thirteen".