810068081 has 2 divisors, whose sum is σ = 810068082. Its totient is φ = 810068080.

The previous prime is 810068029. The next prime is 810068087. The reversal of 810068081 is 180860018.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 685968481 + 124099600 = 26191^2 + 11140^2 .

It is a cyclic number.

It is not a de Polignac number, because 810068081 - 2¹⁸ = 809805937 is a prime.

It is a super-2 number, since 2×810068081² = 1312420591710045122, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (810068087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 405034040 + 405034041.

It is an arithmetic number, because the mean of its divisors is an integer number (405034041).

Almost surely, 2^810068081 is an apocalyptic number.

It is an amenable number.

810068081 is a deficient number, since it is larger than the sum of its proper divisors (1).

810068081 is an equidigital number, since it uses as much as digits as its factorization.

810068081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3072, while the sum is 32.

The square root of 810068081 is about 28461.6949776362. The cubic root of 810068081 is about 932.1958675355.

The spelling of 810068081 in words is "eight hundred ten million, sixty-eight thousand, eighty-one".