2803649 has 2 divisors, whose sum is σ = 2803650. Its totient is φ = 2803648.

The previous prime is 2803639. The next prime is 2803651. The reversal of 2803649 is 9463082.

2803649 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., 1803649 + 1000000 = 1343^2 + 1000^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2803649 is a prime.

Together with 2803651, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2803639) 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, 1401824 + 1401825.

It is an arithmetic number, because the mean of its divisors is an integer number (1401825).

2^2803649 is an apocalyptic number.

It is an amenable number.

2803649 is a deficient number, since it is larger than the sum of its proper divisors (1).

2803649 is an equidigital number, since it uses as much as digits as its factorization.

2803649 is an odious number, because the sum of its binary digits is odd.

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

The square root of 2803649 is about 1674.4100453593. The cubic root of 2803649 is about 141.0071756655.

The spelling of 2803649 in words is "two million, eight hundred three thousand, six hundred forty-nine".