810465913 has 4 divisors (see below), whose sum is σ = 810527220. Its totient is φ = 810404608.

The previous prime is 810465911. The next prime is 810465941. The reversal of 810465913 is 319564018.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 318158569 + 492307344 = 17837^2 + 22188^2 .

It is a cyclic number.

It is not a de Polignac number, because 810465913 - 2¹ = 810465911 is a prime.

It is a super-2 number, since 2×810465913² = 1313709992269847138, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (810465911) 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, 1720 + ... + 40297.

It is an arithmetic number, because the mean of its divisors is an integer number (202631805).

Almost surely, 2^810465913 is an apocalyptic number.

It is an amenable number.

810465913 is a deficient number, since it is larger than the sum of its proper divisors (61307).

810465913 is a wasteful number, since it uses less digits than its factorization.

810465913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61306.

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 810465913 is about 28468.6830218751. The cubic root of 810465913 is about 932.3484459262.

The spelling of 810465913 in words is "eight hundred ten million, four hundred sixty-five thousand, nine hundred thirteen".