2004989 has 4 divisors (see below), whose sum is σ = 2291424. Its totient is φ = 1718556.

The previous prime is 2004983. The next prime is 2004991. The reversal of 2004989 is 9894002.

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 de Polignac number, because none of the positive numbers 2^k-2004989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2004983) 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, 143207 + ... + 143220.

It is an arithmetic number, because the mean of its divisors is an integer number (572856).

2^2004989 is an apocalyptic number.

It is an amenable number.

2004989 is a deficient number, since it is larger than the sum of its proper divisors (286435).

2004989 is an equidigital number, since it uses as much as digits as its factorization.

2004989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 286434.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 2004989 is about 1415.9763416103. The cubic root of 2004989 is about 126.0967804353.

The spelling of 2004989 in words is "two million, four thousand, nine hundred eighty-nine".