809668127 has 2 divisors, whose sum is σ = 809668128. Its totient is φ = 809668126.

The previous prime is 809668099. The next prime is 809668141. The reversal of 809668127 is 721866908.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 809668127 - 2²⁶ = 742559263 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (809662127) 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, 404834063 + 404834064.

It is an arithmetic number, because the mean of its divisors is an integer number (404834064).

Almost surely, 2^809668127 is an apocalyptic number.

809668127 is a deficient number, since it is larger than the sum of its proper divisors (1).

809668127 is an equidigital number, since it uses as much as digits as its factorization.

809668127 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 290304, while the sum is 47.

The square root of 809668127 is about 28454.6679298845. The cubic root of 809668127 is about 932.0424249416.

The spelling of 809668127 in words is "eight hundred nine million, six hundred sixty-eight thousand, one hundred twenty-seven".