813964 has 12 divisors (see below), whose sum is σ = 1449000. Its totient is φ = 399968.

The previous prime is 813961. The next prime is 813971. The reversal of 813964 is 469318.

813964 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (813961) 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, 1489 + ... + 1960.

It is an arithmetic number, because the mean of its divisors is an integer number (120750).

2⁸¹³⁹⁶⁴ is an apocalyptic number.

It is an amenable number.

813964 is a deficient number, since it is larger than the sum of its proper divisors (635036).

813964 is a wasteful number, since it uses less digits than its factorization.

813964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3512 (or 3510 counting only the distinct ones).

The product of its digits is 5184, while the sum is 31.

The square root of 813964 is about 902.1995344712. The cubic root of 813964 is about 93.3687903831.

The spelling of 813964 in words is "eight hundred thirteen thousand, nine hundred sixty-four".