1809000329 has 4 divisors (see below), whose sum is σ = 1809444480. Its totient is φ = 1808556180.

The previous prime is 1809000289. The next prime is 1809000377. The reversal of 1809000329 is 9230009081.

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 a de Polignac number, because none of the positive numbers 2^k-1809000329 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1809000295 and 1809000304.

It is not an unprimeable number, because it can be changed into a prime (1809000229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 215909 + ... + 224130.

It is an arithmetic number, because the mean of its divisors is an integer number (452361120).

Almost surely, 2^1809000329 is an apocalyptic number.

It is an amenable number.

1809000329 is a deficient number, since it is larger than the sum of its proper divisors (444151).

1809000329 is an equidigital number, since it uses as much as digits as its factorization.

1809000329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 444150.

The product of its (nonzero) digits is 3888, while the sum is 32.

The square root of 1809000329 is about 42532.3445039184. The cubic root of 1809000329 is about 1218.4645040004.

The spelling of 1809000329 in words is "one billion, eight hundred nine million, three hundred twenty-nine", and thus it is an aban number.