2641649 has 2 divisors, whose sum is σ = 2641650. Its totient is φ = 2641648.

The previous prime is 2641637. The next prime is 2641657. The reversal of 2641649 is 9461462.

It is a happy number.

2641649 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2640625 + 1024 = 1625^2 + 32^2 .

It is a cyclic number.

It is not a de Polignac number, because 2641649 - 2⁴ = 2641633 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2641669) 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, 1320824 + 1320825.

It is an arithmetic number, because the mean of its divisors is an integer number (1320825).

2^2641649 is an apocalyptic number.

It is an amenable number.

2641649 is a deficient number, since it is larger than the sum of its proper divisors (1).

2641649 is an equidigital number, since it uses as much as digits as its factorization.

2641649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10368, while the sum is 32.

The square root of 2641649 is about 1625.3150463833. The cubic root of 2641649 is about 138.2372345905.

The spelling of 2641649 in words is "two million, six hundred forty-one thousand, six hundred forty-nine".