809884394419 has 2 divisors, whose sum is σ = 809884394420. Its totient is φ = 809884394418.

The previous prime is 809884394413. The next prime is 809884394441. The reversal of 809884394419 is 914493488908.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 809884394419 - 2⁵ = 809884394387 is a prime.

It is a super-2 number, since 2×809884394419² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (809884394413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 404942197209 + 404942197210.

It is an arithmetic number, because the mean of its divisors is an integer number (404942197210).

Almost surely, 2^809884394419 is an apocalyptic number.

809884394419 is a deficient number, since it is larger than the sum of its proper divisors (1).

809884394419 is an equidigital number, since it uses as much as digits as its factorization.

809884394419 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 71663616, while the sum is 67.

The spelling of 809884394419 in words is "eight hundred nine billion, eight hundred eighty-four million, three hundred ninety-four thousand, four hundred nineteen".