1813003441 has 4 divisors (see below), whose sum is σ = 1862003572. Its totient is φ = 1764003312.

The previous prime is 1813003433. The next prime is 1813003463. The reversal of 1813003441 is 1443003181.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1443003181 = 421 ⋅3427561.

It can be written as a sum of positive squares in 2 ways, for example, as 719312400 + 1093691041 = 26820^2 + 33071^2 .

It is a cyclic number.

It is not a de Polignac number, because 1813003441 - 2³ = 1813003433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1813003141) 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 3 ways as a sum of consecutive naturals, for example, 24500010 + ... + 24500083.

It is an arithmetic number, because the mean of its divisors is an integer number (465500893).

Almost surely, 2^1813003441 is an apocalyptic number.

It is an amenable number.

1813003441 is a deficient number, since it is larger than the sum of its proper divisors (49000131).

1813003441 is an equidigital number, since it uses as much as digits as its factorization.

1813003441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49000130.

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 1813003441 is about 42579.3781189909. The cubic root of 1813003441 is about 1219.3626163117.

The spelling of 1813003441 in words is "one billion, eight hundred thirteen million, three thousand, four hundred forty-one".