3681149 has 2 divisors, whose sum is σ = 3681150. Its totient is φ = 3681148.

The previous prime is 3681131. The next prime is 3681151. The reversal of 3681149 is 9411863.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3667225 + 13924 = 1915^2 + 118^2 .

It is a cyclic number.

It is not a de Polignac number, because 3681149 - 2⁸ = 3680893 is a prime.

Together with 3681151, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3681199) 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, 1840574 + 1840575.

It is an arithmetic number, because the mean of its divisors is an integer number (1840575).

Almost surely, 2^3681149 is an apocalyptic number.

It is an amenable number.

3681149 is a deficient number, since it is larger than the sum of its proper divisors (1).

3681149 is an equidigital number, since it uses as much as digits as its factorization.

3681149 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5184, while the sum is 32.

The square root of 3681149 is about 1918.6320647795. The cubic root of 3681149 is about 154.4049191029.

The spelling of 3681149 in words is "three million, six hundred eighty-one thousand, one hundred forty-nine".