904493 has 4 divisors (see below), whose sum is σ = 906780. Its totient is φ = 902208.

The previous prime is 904489. The next prime is 904499. The reversal of 904493 is 394409.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 605284 + 299209 = 778^2 + 547^2 .

It is a cyclic number.

It is not a de Polignac number, because 904493 - 2² = 904489 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 (904499) 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, 380 + ... + 1397.

It is an arithmetic number, because the mean of its divisors is an integer number (226695).

2⁹⁰⁴⁴⁹³ is an apocalyptic number.

It is an amenable number.

904493 is a deficient number, since it is larger than the sum of its proper divisors (2287).

904493 is a wasteful number, since it uses less digits than its factorization.

904493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2286.

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 904493 is about 951.0483689067. The cubic root of 904493 is about 96.7093364272.

The spelling of 904493 in words is "nine hundred four thousand, four hundred ninety-three".