3831689 has 2 divisors, whose sum is σ = 3831690. Its totient is φ = 3831688.

The previous prime is 3831661. The next prime is 3831691. The reversal of 3831689 is 9861383.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2948089 + 883600 = 1717^2 + 940^2 .

It is a cyclic number.

It is not a de Polignac number, because 3831689 - 2¹⁶ = 3766153 is a prime.

Together with 3831691, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (3831649) 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, 1915844 + 1915845.

It is an arithmetic number, because the mean of its divisors is an integer number (1915845).

Almost surely, 2^3831689 is an apocalyptic number.

It is an amenable number.

3831689 is a deficient number, since it is larger than the sum of its proper divisors (1).

3831689 is an equidigital number, since it uses as much as digits as its factorization.

3831689 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31104, while the sum is 38.

The square root of 3831689 is about 1957.4700508565. The cubic root of 3831689 is about 156.4816502080.

The spelling of 3831689 in words is "three million, eight hundred thirty-one thousand, six hundred eighty-nine".