904489 has 2 divisors, whose sum is σ = 904490. Its totient is φ = 904488.

The previous prime is 904483. The next prime is 904499. The reversal of 904489 is 984409.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 501264 + 403225 = 708^2 + 635^2 .

It is a cyclic number.

It is not a de Polignac number, because 904489 - 2⁷ = 904361 is a prime.

It is a super-2 number, since 2×904489² = 1636200702242, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (904483) 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 as a sum of consecutive naturals, namely, 452244 + 452245.

It is an arithmetic number, because the mean of its divisors is an integer number (452245).

2⁹⁰⁴⁴⁸⁹ is an apocalyptic number.

It is an amenable number.

904489 is a deficient number, since it is larger than the sum of its proper divisors (1).

904489 is an equidigital number, since it uses as much as digits as its factorization.

904489 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 904489 is about 951.0462659619. The cubic root of 904489 is about 96.7091938656.

The spelling of 904489 in words is "nine hundred four thousand, four hundred eighty-nine".