809323 has 2 divisors, whose sum is σ = 809324. Its totient is φ = 809322.

The previous prime is 809309. The next prime is 809339. The reversal of 809323 is 323908.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-809323 is a prime.

It is an Ulam number.

809323 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (809383) 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, 404661 + 404662.

It is an arithmetic number, because the mean of its divisors is an integer number (404662).

2⁸⁰⁹³²³ is an apocalyptic number.

809323 is a deficient number, since it is larger than the sum of its proper divisors (1).

809323 is an equidigital number, since it uses as much as digits as its factorization.

809323 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 809323 is about 899.6238102674. The cubic root of 809323 is about 93.1909976139.

The spelling of 809323 in words is "eight hundred nine thousand, three hundred twenty-three".