808919 has 2 divisors, whose sum is σ = 808920. Its totient is φ = 808918.

The previous prime is 808867. The next prime is 808937. The reversal of 808919 is 919808.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 808919 - 2¹² = 804823 is a prime.

It is a super-2 number, since 2×808919² = 1308699897122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (808019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 404459 + 404460.

It is an arithmetic number, because the mean of its divisors is an integer number (404460).

2⁸⁰⁸⁹¹⁹ is an apocalyptic number.

808919 is a deficient number, since it is larger than the sum of its proper divisors (1).

808919 is an equidigital number, since it uses as much as digits as its factorization.

808919 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 35.

The square root of 808919 is about 899.3992439401. The cubic root of 808919 is about 93.1754885899.

Subtracting 808919 from its reverse (919808), we obtain a square (110889 = 333²).

The spelling of 808919 in words is "eight hundred eight thousand, nine hundred nineteen".