2647643 has 2 divisors, whose sum is σ = 2647644. Its totient is φ = 2647642.

The previous prime is 2647627. The next prime is 2647649. The reversal of 2647643 is 3467462.

2647643 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 is a cyclic number.

It is not a de Polignac number, because 2647643 - 2⁴ = 2647627 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (2647649) 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, 1323821 + 1323822.

It is an arithmetic number, because the mean of its divisors is an integer number (1323822).

2^2647643 is an apocalyptic number.

2647643 is a deficient number, since it is larger than the sum of its proper divisors (1).

2647643 is an equidigital number, since it uses as much as digits as its factorization.

2647643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24192, while the sum is 32.

The square root of 2647643 is about 1627.1579517674. The cubic root of 2647643 is about 138.3417107554.

The spelling of 2647643 in words is "two million, six hundred forty-seven thousand, six hundred forty-three".