3821685841 has 2 divisors, whose sum is σ = 3821685842. Its totient is φ = 3821685840.

The previous prime is 3821685823. The next prime is 3821685913. The reversal of 3821685841 is 1485861283.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2828112400 + 993573441 = 53180^2 + 31521^2 .

It is an emirp because it is prime and its reverse (1485861283) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3821685841 - 2⁷ = 3821685713 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3821685791 and 3821685800.

It is not a weakly prime, because it can be changed into another prime (3821685041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1910842920 + 1910842921.

It is an arithmetic number, because the mean of its divisors is an integer number (1910842921).

Almost surely, 2^3821685841 is an apocalyptic number.

It is an amenable number.

3821685841 is a deficient number, since it is larger than the sum of its proper divisors (1).

3821685841 is an equidigital number, since it uses as much as digits as its factorization.

3821685841 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 368640, while the sum is 46.

The square root of 3821685841 is about 61819.7851905035. The cubic root of 3821685841 is about 1563.4535913974.

The spelling of 3821685841 in words is "three billion, eight hundred twenty-one million, six hundred eighty-five thousand, eight hundred forty-one".