3686849 has 2 divisors, whose sum is σ = 3686850. Its totient is φ = 3686848.

The previous prime is 3686833. The next prime is 3686867. The reversal of 3686849 is 9486863.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3356224 + 330625 = 1832^2 + 575^2 .

It is a cyclic number.

It is not a de Polignac number, because 3686849 - 2⁴ = 3686833 is a prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (3686549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1843424 + 1843425.

It is an arithmetic number, because the mean of its divisors is an integer number (1843425).

Almost surely, 2^3686849 is an apocalyptic number.

It is an amenable number.

3686849 is a deficient number, since it is larger than the sum of its proper divisors (1).

3686849 is an equidigital number, since it uses as much as digits as its factorization.

3686849 is an evil number, because the sum of its binary digits is even.

The product of its digits is 248832, while the sum is 44.

The square root of 3686849 is about 1920.1169235231. The cubic root of 3686849 is about 154.4845730522.

The spelling of 3686849 in words is "three million, six hundred eighty-six thousand, eight hundred forty-nine".