810550969 has 2 divisors, whose sum is σ = 810550970. Its totient is φ = 810550968.

The previous prime is 810550919. The next prime is 810550987. The reversal of 810550969 is 969055018.

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., 772172944 + 38378025 = 27788^2 + 6195^2 .

It is a cyclic number.

It is not a de Polignac number, because 810550969 - 2⁹ = 810550457 is a prime.

It is a super-2 number, since 2×810550969² = 1313985746693677922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (810550919) 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, 405275484 + 405275485.

It is an arithmetic number, because the mean of its divisors is an integer number (405275485).

Almost surely, 2^810550969 is an apocalyptic number.

It is an amenable number.

810550969 is a deficient number, since it is larger than the sum of its proper divisors (1).

810550969 is an equidigital number, since it uses as much as digits as its factorization.

810550969 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 97200, while the sum is 43.

The square root of 810550969 is about 28470.1768347160. The cubic root of 810550969 is about 932.3810605224.

The spelling of 810550969 in words is "eight hundred ten million, five hundred fifty thousand, nine hundred sixty-nine".