3831649 has 2 divisors, whose sum is σ = 3831650. Its totient is φ = 3831648.

The previous prime is 3831643. The next prime is 3831661. The reversal of 3831649 is 9461383.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3489424 + 342225 = 1868^2 + 585^2 .

It is an emirp because it is prime and its reverse (9461383) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3831649 - 2¹¹ = 3829601 is a prime.

It is not a weakly prime, because it can be changed into another prime (3831643) 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, 1915824 + 1915825.

It is an arithmetic number, because the mean of its divisors is an integer number (1915825).

Almost surely, 2^3831649 is an apocalyptic number.

It is an amenable number.

3831649 is a deficient number, since it is larger than the sum of its proper divisors (1).

3831649 is an equidigital number, since it uses as much as digits as its factorization.

3831649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15552, while the sum is 34.

The square root of 3831649 is about 1957.4598335598. The cubic root of 3831649 is about 156.4811056885.

The spelling of 3831649 in words is "three million, eight hundred thirty-one thousand, six hundred forty-nine".