809130647 has 4 divisors (see below), whose sum is σ = 871371480. Its totient is φ = 746889816.

The previous prime is 809130583. The next prime is 809130649. The reversal of 809130647 is 746031908.

809130647 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 is a cyclic number.

It is not a de Polignac number, because 809130647 - 2⁶ = 809130583 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 809130647.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (809130649) 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, 31120397 + ... + 31120422.

It is an arithmetic number, because the mean of its divisors is an integer number (217842870).

Almost surely, 2^809130647 is an apocalyptic number.

809130647 is a deficient number, since it is larger than the sum of its proper divisors (62240833).

809130647 is a wasteful number, since it uses less digits than its factorization.

809130647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62240832.

The product of its (nonzero) digits is 36288, while the sum is 38.

The square root of 809130647 is about 28445.2218658952. The cubic root of 809130647 is about 931.8361408129.

The spelling of 809130647 in words is "eight hundred nine million, one hundred thirty thousand, six hundred forty-seven".