1813283509 has 4 divisors (see below), whose sum is σ = 1818224704. Its totient is φ = 1808342316.

The previous prime is 1813283501. The next prime is 1813283519. The reversal of 1813283509 is 9053823181.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1813283509 - 2³ = 1813283501 is a prime.

It is a super-2 number, since 2×1813283509² = 6575994168022706162, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1813283501) 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, 2470047 + ... + 2470780.

It is an arithmetic number, because the mean of its divisors is an integer number (454556176).

Almost surely, 2^1813283509 is an apocalyptic number.

It is an amenable number.

1813283509 is a deficient number, since it is larger than the sum of its proper divisors (4941195).

1813283509 is an equidigital number, since it uses as much as digits as its factorization.

1813283509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4941194.

The product of its (nonzero) digits is 51840, while the sum is 40.

The square root of 1813283509 is about 42582.6667671249. Note that the first 3 decimals coincide. The cubic root of 1813283509 is about 1219.4254010547.

The spelling of 1813283509 in words is "one billion, eight hundred thirteen million, two hundred eighty-three thousand, five hundred nine".