2647649 has 2 divisors, whose sum is σ = 2647650. Its totient is φ = 2647648.

The previous prime is 2647643. The next prime is 2647681. The reversal of 2647649 is 9467462.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2512225 + 135424 = 1585^2 + 368^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2647649 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2647643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1323824 + 1323825.

It is an arithmetic number, because the mean of its divisors is an integer number (1323825).

2^2647649 is an apocalyptic number.

It is an amenable number.

2647649 is a deficient number, since it is larger than the sum of its proper divisors (1).

2647649 is an equidigital number, since it uses as much as digits as its factorization.

2647649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72576, while the sum is 38.

The square root of 2647649 is about 1627.1597954719. The cubic root of 2647649 is about 138.3418152571.

The spelling of 2647649 in words is "two million, six hundred forty-seven thousand, six hundred forty-nine".