2108813 has 6 divisors (see below), whose sum is σ = 2453166. Its totient is φ = 1807512.

The previous prime is 2108809. The next prime is 2108819. The reversal of 2108813 is 3188012.

It can be written as a sum of positive squares in only one way, i.e., 1162084 + 946729 = 1078^2 + 973^2 .

It is not a de Polignac number, because 2108813 - 2² = 2108809 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 (2108819) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 21470 + ... + 21567.

It is an arithmetic number, because the mean of its divisors is an integer number (408861).

2^2108813 is an apocalyptic number.

It is an amenable number.

2108813 is a deficient number, since it is larger than the sum of its proper divisors (344353).

2108813 is an equidigital number, since it uses as much as digits as its factorization.

2108813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43051 (or 43044 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 23.

The square root of 2108813 is about 1452.1752649043. The cubic root of 2108813 is about 128.2368052826.

The spelling of 2108813 in words is "two million, one hundred eight thousand, eight hundred thirteen".