1813004809 has 32 divisors (see below), whose sum is σ = 2300700672. Its totient is φ = 1387680000.

The previous prime is 1813004801. The next prime is 1813004819. The reversal of 1813004809 is 9084003181.

It is a happy number.

It is not a de Polignac number, because 1813004809 - 2³ = 1813004801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1813004801) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2191854 + ... + 2192680.

It is an arithmetic number, because the mean of its divisors is an integer number (71896896).

Almost surely, 2^1813004809 is an apocalyptic number.

It is an amenable number.

1813004809 is a deficient number, since it is larger than the sum of its proper divisors (487695863).

1813004809 is a wasteful number, since it uses less digits than its factorization.

1813004809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1317.

The product of its (nonzero) digits is 6912, while the sum is 34.

The square root of 1813004809 is about 42579.3941831022. The cubic root of 1813004809 is about 1219.3629230012.

The spelling of 1813004809 in words is "one billion, eight hundred thirteen million, four thousand, eight hundred nine".