3861289 has 2 divisors, whose sum is σ = 3861290. Its totient is φ = 3861288.

The previous prime is 3861269. The next prime is 3861293. The reversal of 3861289 is 9821683.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3861225 + 64 = 1965^2 + 8^2 .

It is an emirp because it is prime and its reverse (9821683) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3861289 - 2⁹ = 3860777 is a prime.

It is not a weakly prime, because it can be changed into another prime (3861259) 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, 1930644 + 1930645.

It is an arithmetic number, because the mean of its divisors is an integer number (1930645).

Almost surely, 2^3861289 is an apocalyptic number.

It is an amenable number.

3861289 is a deficient number, since it is larger than the sum of its proper divisors (1).

3861289 is an equidigital number, since it uses as much as digits as its factorization.

3861289 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20736, while the sum is 37.

The square root of 3861289 is about 1965.0162849198. The cubic root of 3861289 is about 156.8835600584.

The spelling of 3861289 in words is "three million, eight hundred sixty-one thousand, two hundred eighty-nine".