809061291 has 10 divisors (see below), whose sum is σ = 1208597852. Its totient is φ = 539374140.

The previous prime is 809061289. The next prime is 809061299. The reversal of 809061291 is 192160908.

809061291 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 809061291 - 2¹ = 809061289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (809061299) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 4994125 + ... + 4994286.

Almost surely, 2^809061291 is an apocalyptic number.

809061291 is a gapful number since it is divisible by the number (81) formed by its first and last digit.

809061291 is a deficient number, since it is larger than the sum of its proper divisors (399536561).

809061291 is an equidigital number, since it uses as much as digits as its factorization.

809061291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9988423 (or 9988414 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 36.

The square root of 809061291 is about 28444.0027246518. The cubic root of 809061291 is about 931.8095154159.

The spelling of 809061291 in words is "eight hundred nine million, sixty-one thousand, two hundred ninety-one".