809186441 has 12 divisors (see below), whose sum is σ = 943692228. Its totient is φ = 691824672.

The previous prime is 809186431. The next prime is 809186467. The reversal of 809186441 is 144681908.

It can be written as a sum of positive squares in 2 ways, for example, as 405015625 + 404170816 = 20125^2 + 20104^2 .

It is a de Polignac number, because none of the positive numbers 2^k-809186441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (809186401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1346 + ... + 40251.

It is an arithmetic number, because the mean of its divisors is an integer number (78641019).

Almost surely, 2^809186441 is an apocalyptic number.

It is an amenable number.

809186441 is a deficient number, since it is larger than the sum of its proper divisors (134505787).

809186441 is a wasteful number, since it uses less digits than its factorization.

809186441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42008 (or 42001 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 41.

The square root of 809186441 is about 28446.2025760909. The cubic root of 809186441 is about 931.8575587264.

The spelling of 809186441 in words is "eight hundred nine million, one hundred eighty-six thousand, four hundred forty-one".