3821685913 has 2 divisors, whose sum is σ = 3821685914. Its totient is φ = 3821685912.

The previous prime is 3821685841. The next prime is 3821685919. The reversal of 3821685913 is 3195861283.

3821685913 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., 3751930009 + 69755904 = 61253^2 + 8352^2 .

It is an emirp because it is prime and its reverse (3195861283) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3821685913 is a prime.

It is not a weakly prime, because it can be changed into another prime (3821685919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1910842956 + 1910842957.

It is an arithmetic number, because the mean of its divisors is an integer number (1910842957).

Almost surely, 2^3821685913 is an apocalyptic number.

It is an amenable number.

3821685913 is a deficient number, since it is larger than the sum of its proper divisors (1).

3821685913 is an equidigital number, since it uses as much as digits as its factorization.

3821685913 is an evil number, because the sum of its binary digits is even.

The product of its digits is 311040, while the sum is 46.

The square root of 3821685913 is about 61819.7857728414. The cubic root of 3821685913 is about 1563.4536012158.

The spelling of 3821685913 in words is "three billion, eight hundred twenty-one million, six hundred eighty-five thousand, nine hundred thirteen".