1813113 has 24 divisors (see below), whose sum is σ = 2882880. Its totient is φ = 1092960.

The previous prime is 1813081. The next prime is 1813121. The reversal of 1813113 is 3113181.

It is a happy number.

It is not a de Polignac number, because 1813113 - 2⁵ = 1813081 is a prime.

1813113 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1813313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3703 + ... + 4163.

It is an arithmetic number, because the mean of its divisors is an integer number (120120).

2^1813113 is an apocalyptic number.

It is an amenable number.

1813113 is a deficient number, since it is larger than the sum of its proper divisors (1069767).

1813113 is a wasteful number, since it uses less digits than its factorization.

1813113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 509 (or 506 counting only the distinct ones).

The product of its digits is 72, while the sum is 18.

The square root of 1813113 is about 1346.5188450222. The cubic root of 1813113 is about 121.9387177666.

Adding to 1813113 its reverse (3113181), we get a palindrome (4926294).

It can be divided in two parts, 18 and 13113, that added together give a palindrome (13131).

The spelling of 1813113 in words is "one million, eight hundred thirteen thousand, one hundred thirteen".