809115047 has 12 divisors (see below), whose sum is σ = 896525784. Its totient is φ = 729499680.

The previous prime is 809115037. The next prime is 809115059. The reversal of 809115047 is 740511908.

809115047 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 809115047 - 2⁴ = 809115031 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 809114998 and 809115016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (809115037) 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, 48404 + ... + 62937.

It is an arithmetic number, because the mean of its divisors is an integer number (74710482).

Almost surely, 2^809115047 is an apocalyptic number.

809115047 is a deficient number, since it is larger than the sum of its proper divisors (87410737).

809115047 is a wasteful number, since it uses less digits than its factorization.

809115047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111410 (or 111397 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 35.

The square root of 809115047 is about 28444.9476533180. The cubic root of 809115047 is about 931.8301521890.

It can be divided in two parts, 80911 and 5047, that added together give a palindrome (85958).

The spelling of 809115047 in words is "eight hundred nine million, one hundred fifteen thousand, forty-seven".