808439 has 2 divisors, whose sum is σ = 808440. Its totient is φ = 808438.

The previous prime is 808421. The next prime is 808441. The reversal of 808439 is 934808.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-808439 is a prime.

Together with 808441, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (808459) 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, 404219 + 404220.

It is an arithmetic number, because the mean of its divisors is an integer number (404220).

2⁸⁰⁸⁴³⁹ is an apocalyptic number.

808439 is a deficient number, since it is larger than the sum of its proper divisors (1).

808439 is an equidigital number, since it uses as much as digits as its factorization.

808439 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 808439 is about 899.1323595556. The cubic root of 808439 is about 93.1570553131.

The spelling of 808439 in words is "eight hundred eight thousand, four hundred thirty-nine".