810000013 has 4 divisors (see below), whose sum is σ = 814682268. Its totient is φ = 805317760.

The previous prime is 810000011. The next prime is 810000019. The reversal of 810000013 is 310000018.

810000013 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 571544649 + 238455364 = 23907^2 + 15442^2 .

It is a cyclic number.

It is not a de Polignac number, because 810000013 - 2¹ = 810000011 is a prime.

It is a super-2 number, since 2×810000013² = 1312200042120000338, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 809999948 and 810000002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (810000011) 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, 2340868 + ... + 2341213.

It is an arithmetic number, because the mean of its divisors is an integer number (203670567).

Almost surely, 2^810000013 is an apocalyptic number.

It is an amenable number.

810000013 is a deficient number, since it is larger than the sum of its proper divisors (4682255).

810000013 is a wasteful number, since it uses less digits than its factorization.

810000013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4682254.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 810000013 is about 28460.4991699021. The cubic root of 810000013 is about 932.1697567731.

The spelling of 810000013 in words is "eight hundred ten million, thirteen", and thus it is an aban number.