3686549 has 2 divisors, whose sum is σ = 3686550. Its totient is φ = 3686548.

The previous prime is 3686537. The next prime is 3686561. The reversal of 3686549 is 9456863.

It is a balanced prime because it is at equal distance from previous prime (3686537) and next prime (3686561).

It can be written as a sum of positive squares in only one way, i.e., 2745649 + 940900 = 1657^2 + 970^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3686549 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3686849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1843274 + 1843275.

It is an arithmetic number, because the mean of its divisors is an integer number (1843275).

Almost surely, 2^3686549 is an apocalyptic number.

It is an amenable number.

3686549 is a deficient number, since it is larger than the sum of its proper divisors (1).

3686549 is an equidigital number, since it uses as much as digits as its factorization.

3686549 is an evil number, because the sum of its binary digits is even.

The product of its digits is 155520, while the sum is 41.

The square root of 3686549 is about 1920.0388016913. The cubic root of 3686549 is about 154.4803827866.

The spelling of 3686549 in words is "three million, six hundred eighty-six thousand, five hundred forty-nine".