1808043799 has 4 divisors (see below), whose sum is σ = 1846512864. Its totient is φ = 1769574736.

The previous prime is 1808043793. The next prime is 1808043821. The reversal of 1808043799 is 9973408081.

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 1808043799 - 2⁵ = 1808043767 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1808043793) 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, 19234462 + ... + 19234555.

It is an arithmetic number, because the mean of its divisors is an integer number (461628216).

Almost surely, 2^1808043799 is an apocalyptic number.

1808043799 is a deficient number, since it is larger than the sum of its proper divisors (38469065).

1808043799 is an equidigital number, since it uses as much as digits as its factorization.

1808043799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38469064.

The product of its (nonzero) digits is 435456, while the sum is 49.

The square root of 1808043799 is about 42521.0982807359. The cubic root of 1808043799 is about 1218.2497070364.

The spelling of 1808043799 in words is "one billion, eight hundred eight million, forty-three thousand, seven hundred ninety-nine".