813464865 has 12 divisors (see below), whose sum is σ = 1410005844. Its totient is φ = 433847904.

The previous prime is 813464789. The next prime is 813464867. The reversal of 813464865 is 568464318.

813464865 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 289238049 + 524226816 = 17007^2 + 22896^2 .

It is not a de Polignac number, because 813464865 - 2⁷ = 813464737 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 18076997 = 813464865 / (8 + 1 + 3 + 4 + 6 + 4 + 8 + 6 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 813464865.

It is not an unprimeable number, because it can be changed into a prime (813464867) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9038454 + ... + 9038543.

It is an arithmetic number, because the mean of its divisors is an integer number (117500487).

Almost surely, 2^813464865 is an apocalyptic number.

It is an amenable number.

813464865 is a deficient number, since it is larger than the sum of its proper divisors (596540979).

813464865 is a wasteful number, since it uses less digits than its factorization.

813464865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18077008 (or 18077005 counting only the distinct ones).

The product of its digits is 552960, while the sum is 45.

The square root of 813464865 is about 28521.3054574997. The cubic root of 813464865 is about 933.4970143062.

The spelling of 813464865 in words is "eight hundred thirteen million, four hundred sixty-four thousand, eight hundred sixty-five".