813968 has 10 divisors (see below), whose sum is σ = 1577094. Its totient is φ = 406976.

The previous prime is 813961. The next prime is 813971. The reversal of 813968 is 869318.

It can be written as a sum of positive squares in only one way, i.e., 719104 + 94864 = 848^2 + 308^2 .

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 as a sum of consecutive naturals, namely, 25421 + ... + 25452.

2⁸¹³⁹⁶⁸ is an apocalyptic number.

It is an amenable number.

813968 is a deficient number, since it is larger than the sum of its proper divisors (763126).

813968 is a wasteful number, since it uses less digits than its factorization.

813968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50881 (or 50875 counting only the distinct ones).

The product of its digits is 10368, while the sum is 35.

The square root of 813968 is about 902.2017512730. The cubic root of 813968 is about 93.3689433279.

The spelling of 813968 in words is "eight hundred thirteen thousand, nine hundred sixty-eight".