904213 has 4 divisors (see below), whose sum is σ = 957420. Its totient is φ = 851008.

The previous prime is 904207. The next prime is 904217. The reversal of 904213 is 312409.

904213 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 815409 + 88804 = 903^2 + 298^2 .

It is a cyclic number.

It is not a de Polignac number, because 904213 - 2⁵ = 904181 is a prime.

It is a super-2 number, since 2×904213² = 1635202298738, which contains 22 as substring.

It is a Duffinian number.

904213 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (904217) 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, 26578 + ... + 26611.

It is an arithmetic number, because the mean of its divisors is an integer number (239355).

2⁹⁰⁴²¹³ is an apocalyptic number.

It is an amenable number.

904213 is a deficient number, since it is larger than the sum of its proper divisors (53207).

904213 is a wasteful number, since it uses less digits than its factorization.

904213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53206.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 904213 is about 950.9011515399. The cubic root of 904213 is about 96.6993560998.

The spelling of 904213 in words is "nine hundred four thousand, two hundred thirteen".