1904089 has 4 divisors (see below), whose sum is σ = 2077200. Its totient is φ = 1730980.

The previous prime is 1904087. The next prime is 1904093. The reversal of 1904089 is 9804091.

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 1904089 - 2¹ = 1904087 is a prime.

It is a Smith number, since the sum of its digits (31) 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 self number, because there is not a number n which added to its sum of digits gives 1904089.

It is not an unprimeable number, because it can be changed into a prime (1904087) 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, 86539 + ... + 86560.

It is an arithmetic number, because the mean of its divisors is an integer number (519300).

2^1904089 is an apocalyptic number.

It is an amenable number.

1904089 is a deficient number, since it is larger than the sum of its proper divisors (173111).

1904089 is a wasteful number, since it uses less digits than its factorization.

1904089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173110.

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 1904089 is about 1379.8873142398. The cubic root of 1904089 is about 123.9450198508.

The spelling of 1904089 in words is "one million, nine hundred four thousand, eighty-nine".