1803139009 has 4 divisors (see below), whose sum is σ = 2060730304. Its totient is φ = 1545547716.

The previous prime is 1803139001. The next prime is 1803139031. The reversal of 1803139009 is 9009313081.

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 1803139009 - 2³ = 1803139001 is a prime.

It is a super-3 number, since 3×1803139009³ (a number of 29 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1803139001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 128795637 + ... + 128795650.

It is an arithmetic number, because the mean of its divisors is an integer number (515182576).

Almost surely, 2^1803139009 is an apocalyptic number.

It is an amenable number.

1803139009 is a deficient number, since it is larger than the sum of its proper divisors (257591295).

1803139009 is an equidigital number, since it uses as much as digits as its factorization.

1803139009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 257591294.

The product of its (nonzero) digits is 5832, while the sum is 34.

The square root of 1803139009 is about 42463.3843328579. The cubic root of 1803139009 is about 1217.1471027944.

The spelling of 1803139009 in words is "one billion, eight hundred three million, one hundred thirty-nine thousand, nine".