1844009 has 4 divisors (see below), whose sum is σ = 1862016. Its totient is φ = 1826004.

The previous prime is 1843999. The next prime is 1844021. The reversal of 1844009 is 9004481.

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 1844009 - 2⁴ = 1843993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1844039) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8849 + ... + 9054.

It is an arithmetic number, because the mean of its divisors is an integer number (465504).

2^1844009 is an apocalyptic number.

It is an amenable number.

1844009 is a deficient number, since it is larger than the sum of its proper divisors (18007).

1844009 is a wasteful number, since it uses less digits than its factorization.

1844009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18006.

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 1844009 is about 1357.9429295814. The cubic root of 1844009 is about 122.6274447632.

The spelling of 1844009 in words is "one million, eight hundred forty-four thousand, nine".