1108813 has 4 divisors (see below), whose sum is σ = 1129788. Its totient is φ = 1087840.

The previous prime is 1108801. The next prime is 1108817. The reversal of 1108813 is 3188011.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3188011 = 919 ⋅3469.

It can be written as a sum of positive squares in 2 ways, for example, as 797449 + 311364 = 893^2 + 558^2 .

It is a cyclic number.

It is not a de Polignac number, because 1108813 - 2⁵ = 1108781 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1108817) 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, 10408 + ... + 10513.

It is an arithmetic number, because the mean of its divisors is an integer number (282447).

2^1108813 is an apocalyptic number.

It is an amenable number.

1108813 is a deficient number, since it is larger than the sum of its proper divisors (20975).

1108813 is an equidigital number, since it uses as much as digits as its factorization.

1108813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20974.

The product of its (nonzero) digits is 192, while the sum is 22.

The square root of 1108813 is about 1053.0018993335. The cubic root of 1108813 is about 103.5029599222.

The spelling of 1108813 in words is "one million, one hundred eight thousand, eight hundred thirteen".