813684 has 12 divisors (see below), whose sum is σ = 1898624. Its totient is φ = 271224.

The previous prime is 813677. The next prime is 813697. The reversal of 813684 is 486318.

It is a happy number.

813684 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is a plaindrome in base 15.

It is a congruent number.

It is an unprimeable number.

813684 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33892 + ... + 33915.

2⁸¹³⁶⁸⁴ is an apocalyptic number.

It is an amenable number.

813684 is an abundant number, since it is smaller than the sum of its proper divisors (1084940).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

813684 is a wasteful number, since it uses less digits than its factorization.

813684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67814 (or 67812 counting only the distinct ones).

The product of its digits is 4608, while the sum is 30.

The square root of 813684 is about 902.0443448079. The cubic root of 813684 is about 93.3580830056.

The spelling of 813684 in words is "eight hundred thirteen thousand, six hundred eighty-four".