810669901 has 2 divisors, whose sum is σ = 810669902. Its totient is φ = 810669900.

The previous prime is 810669851. The next prime is 810669907. The reversal of 810669901 is 109966018.

810669901 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 677821225 + 132848676 = 26035^2 + 11526^2 .

It is a cyclic number.

It is not a de Polignac number, because 810669901 - 2⁷ = 810669773 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (810669907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 405334950 + 405334951.

It is an arithmetic number, because the mean of its divisors is an integer number (405334951).

Almost surely, 2^810669901 is an apocalyptic number.

It is an amenable number.

810669901 is a deficient number, since it is larger than the sum of its proper divisors (1).

810669901 is an equidigital number, since it uses as much as digits as its factorization.

810669901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23328, while the sum is 40.

The square root of 810669901 is about 28472.2654701027. The cubic root of 810669901 is about 932.4266609947.

The spelling of 810669901 in words is "eight hundred ten million, six hundred sixty-nine thousand, nine hundred one".