808821983 has 2 divisors, whose sum is σ = 808821984. Its totient is φ = 808821982.

The previous prime is 808821911. The next prime is 808821991. The reversal of 808821983 is 389128808.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 808821983 - 2¹⁰ = 808820959 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (808821283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 404410991 + 404410992.

It is an arithmetic number, because the mean of its divisors is an integer number (404410992).

Almost surely, 2^808821983 is an apocalyptic number.

808821983 is a deficient number, since it is larger than the sum of its proper divisors (1).

808821983 is an equidigital number, since it uses as much as digits as its factorization.

808821983 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 221184, while the sum is 47.

The square root of 808821983 is about 28439.7957622765. The cubic root of 808821983 is about 931.7176346716.

The spelling of 808821983 in words is "eight hundred eight million, eight hundred twenty-one thousand, nine hundred eighty-three".