3806382821 has 2 divisors, whose sum is σ = 3806382822. Its totient is φ = 3806382820.

The previous prime is 3806382799. The next prime is 3806382823. The reversal of 3806382821 is 1282836083.

3806382821 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3039868225 + 766514596 = 55135^2 + 27686^2 .

It is a cyclic number.

It is not a de Polignac number, because 3806382821 - 2¹⁰ = 3806381797 is a prime.

Together with 3806382823, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3806382823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1903191410 + 1903191411.

It is an arithmetic number, because the mean of its divisors is an integer number (1903191411).

Almost surely, 2^3806382821 is an apocalyptic number.

It is an amenable number.

3806382821 is a deficient number, since it is larger than the sum of its proper divisors (1).

3806382821 is an equidigital number, since it uses as much as digits as its factorization.

3806382821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 110592, while the sum is 41.

The square root of 3806382821 is about 61695.8898225806. The cubic root of 3806382821 is about 1561.3639754075.

The spelling of 3806382821 in words is "three billion, eight hundred six million, three hundred eighty-two thousand, eight hundred twenty-one".