3808821869 has 2 divisors, whose sum is σ = 3808821870. Its totient is φ = 3808821868.

The previous prime is 3808821697. The next prime is 3808821881. The reversal of 3808821869 is 9681288083.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2799997225 + 1008824644 = 52915^2 + 31762^2 .

It is an emirp because it is prime and its reverse (9681288083) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3808821869 - 2¹² = 3808817773 is a prime.

It is a super-3 number, since 3×3808821869³ (a number of 30 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 3808821869.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3808821889) 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, 1904410934 + 1904410935.

It is an arithmetic number, because the mean of its divisors is an integer number (1904410935).

Almost surely, 2^3808821869 is an apocalyptic number.

It is an amenable number.

3808821869 is a deficient number, since it is larger than the sum of its proper divisors (1).

3808821869 is an equidigital number, since it uses as much as digits as its factorization.

3808821869 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1327104, while the sum is 53.

The square root of 3808821869 is about 61715.6533547203. The cubic root of 3808821869 is about 1561.6974003183.

The spelling of 3808821869 in words is "three billion, eight hundred eight million, eight hundred twenty-one thousand, eight hundred sixty-nine".