904389 has 4 divisors (see below), whose sum is σ = 1205856. Its totient is φ = 602924.

The previous prime is 904369. The next prime is 904399. The reversal of 904389 is 983409.

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 904389 - 2⁵ = 904357 is a prime.

It is a D-number.

904389 is a lucky number.

It is a nialpdrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (904369) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 150729 + ... + 150734.

It is an arithmetic number, because the mean of its divisors is an integer number (301464).

2⁹⁰⁴³⁸⁹ is an apocalyptic number.

It is an amenable number.

904389 is a deficient number, since it is larger than the sum of its proper divisors (301467).

904389 is a wasteful number, since it uses less digits than its factorization.

904389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 301466.

The product of its (nonzero) digits is 7776, while the sum is 33.

The square root of 904389 is about 950.9936908308. The cubic root of 904389 is about 96.7056296889.

The spelling of 904389 in words is "nine hundred four thousand, three hundred eighty-nine".