808819393 has 2 divisors, whose sum is σ = 808819394. Its totient is φ = 808819392.

The previous prime is 808819343. The next prime is 808819397. The reversal of 808819393 is 393918808.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 632673409 + 176145984 = 25153^2 + 13272^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-808819393 is a prime.

It is not a weakly prime, because it can be changed into another prime (808819397) 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, 404409696 + 404409697.

It is an arithmetic number, because the mean of its divisors is an integer number (404409697).

Almost surely, 2^808819393 is an apocalyptic number.

It is an amenable number.

808819393 is a deficient number, since it is larger than the sum of its proper divisors (1).

808819393 is an equidigital number, since it uses as much as digits as its factorization.

808819393 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 373248, while the sum is 49.

The square root of 808819393 is about 28439.7502274545. The cubic root of 808819393 is about 931.7166401589.

The spelling of 808819393 in words is "eight hundred eight million, eight hundred nineteen thousand, three hundred ninety-three".