1818813 has 16 divisors (see below), whose sum is σ = 2704320. Its totient is φ = 1080576.

The previous prime is 1818799. The next prime is 1818833. The reversal of 1818813 is 3188181.

It is not a de Polignac number, because 1818813 - 2⁵ = 1818781 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1818833) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31 + ... + 1907.

It is an arithmetic number, because the mean of its divisors is an integer number (169020).

2^1818813 is an apocalyptic number.

It is an amenable number.

1818813 is a deficient number, since it is larger than the sum of its proper divisors (885507).

1818813 is a wasteful number, since it uses less digits than its factorization.

1818813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1916.

The product of its digits is 1536, while the sum is 30.

The square root of 1818813 is about 1348.6337530998. The cubic root of 1818813 is about 122.0663662919.

The spelling of 1818813 in words is "one million, eight hundred eighteen thousand, eight hundred thirteen".