810116309 has 2 divisors, whose sum is σ = 810116310. Its totient is φ = 810116308.

The previous prime is 810116287. The next prime is 810116341. The reversal of 810116309 is 903611018.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 802135684 + 7980625 = 28322^2 + 2825^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-810116309 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (810116609) 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 as a sum of consecutive naturals, namely, 405058154 + 405058155.

It is an arithmetic number, because the mean of its divisors is an integer number (405058155).

Almost surely, 2^810116309 is an apocalyptic number.

It is an amenable number.

810116309 is a deficient number, since it is larger than the sum of its proper divisors (1).

810116309 is an equidigital number, since it uses as much as digits as its factorization.

810116309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 29.

The square root of 810116309 is about 28462.5422090157. The cubic root of 810116309 is about 932.2143668243.

The spelling of 810116309 in words is "eight hundred ten million, one hundred sixteen thousand, three hundred nine".