3808821829 has 4 divisors (see below), whose sum is σ = 3865669984. Its totient is φ = 3751973676.

The previous prime is 3808821697. The next prime is 3808821869. The reversal of 3808821829 is 9281288083.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3808821829 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3808821869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28423977 + ... + 28424110.

It is an arithmetic number, because the mean of its divisors is an integer number (966417496).

Almost surely, 2^3808821829 is an apocalyptic number.

It is an amenable number.

3808821829 is a deficient number, since it is larger than the sum of its proper divisors (56848155).

3808821829 is an equidigital number, since it uses as much as digits as its factorization.

3808821829 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56848154.

The product of its (nonzero) digits is 442368, while the sum is 49.

The square root of 3808821829 is about 61715.6530306534. The cubic root of 3808821829 is about 1561.6973948514.

The spelling of 3808821829 in words is "three billion, eight hundred eight million, eight hundred twenty-one thousand, eight hundred twenty-nine".