904813 has 16 divisors (see below), whose sum is σ = 1138816. Its totient is φ = 699840.

The previous prime is 904811. The next prime is 904823. The reversal of 904813 is 318409.

It is a cyclic number.

It is not a de Polignac number, because 904813 - 2¹ = 904811 is a prime.

It is a plaindrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (904811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5470 + ... + 5632.

It is an arithmetic number, because the mean of its divisors is an integer number (71176).

2⁹⁰⁴⁸¹³ is an apocalyptic number.

It is an amenable number.

904813 is a deficient number, since it is larger than the sum of its proper divisors (234003).

904813 is a wasteful number, since it uses less digits than its factorization.

904813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 904813 is about 951.2165894264. The cubic root of 904813 is about 96.7207399939.

The spelling of 904813 in words is "nine hundred four thousand, eight hundred thirteen".