809827 has 2 divisors, whose sum is σ = 809828. Its totient is φ = 809826.

The previous prime is 809821. The next prime is 809833. The reversal of 809827 is 728908.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (809821) and next prime (809833).

It is a cyclic number.

It is not a de Polignac number, because 809827 - 2¹⁹ = 285539 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 809792 and 809801.

It is not a weakly prime, because it can be changed into another prime (809821) 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, 404913 + 404914.

It is an arithmetic number, because the mean of its divisors is an integer number (404914).

2⁸⁰⁹⁸²⁷ is an apocalyptic number.

809827 is a deficient number, since it is larger than the sum of its proper divisors (1).

809827 is an equidigital number, since it uses as much as digits as its factorization.

809827 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8064, while the sum is 34.

The square root of 809827 is about 899.9038837565. The cubic root of 809827 is about 93.2103382712.

The spelling of 809827 in words is "eight hundred nine thousand, eight hundred twenty-seven".