1813043 has 4 divisors (see below), whose sum is σ = 1820808. Its totient is φ = 1805280.

The previous prime is 1813039. The next prime is 1813073. The reversal of 1813043 is 3403181.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1813043 - 2² = 1813039 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1813003) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3521 + ... + 4002.

It is an arithmetic number, because the mean of its divisors is an integer number (455202).

2^1813043 is an apocalyptic number.

1813043 is a deficient number, since it is larger than the sum of its proper divisors (7765).

1813043 is an equidigital number, since it uses as much as digits as its factorization.

1813043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7764.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 1813043 is about 1346.4928518191. The cubic root of 1813043 is about 121.9371484913.

The spelling of 1813043 in words is "one million, eight hundred thirteen thousand, forty-three".