3549649 has 2 divisors, whose sum is σ = 3549650. Its totient is φ = 3549648.

The previous prime is 3549647. The next prime is 3549673. The reversal of 3549649 is 9469453.

3549649 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3330625 + 219024 = 1825^2 + 468^2 .

It is a cyclic number.

It is not a de Polignac number, because 3549649 - 2¹ = 3549647 is a prime.

Together with 3549647, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (3549641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1774824 + 1774825.

It is an arithmetic number, because the mean of its divisors is an integer number (1774825).

Almost surely, 2^3549649 is an apocalyptic number.

It is an amenable number.

3549649 is a deficient number, since it is larger than the sum of its proper divisors (1).

3549649 is an equidigital number, since it uses as much as digits as its factorization.

3549649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 116640, while the sum is 40.

The square root of 3549649 is about 1884.0512201105. The cubic root of 3549649 is about 152.5440023521.

The spelling of 3549649 in words is "three million, five hundred forty-nine thousand, six hundred forty-nine".