2643671 has 2 divisors, whose sum is σ = 2643672. Its totient is φ = 2643670.

The previous prime is 2643661. The next prime is 2643673. The reversal of 2643671 is 1763462.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2643671 - 2⁶ = 2643607 is a prime.

It is a Sophie Germain prime.

Together with 2643673, it forms a pair of twin primes.

It is a Chen prime.

It is a d-powerful number, because it can be written as 2⁹ + 6² + 4¹⁰ + 3¹³ + 6³ + 7 + 1 .

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2643673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1321835 + 1321836.

It is an arithmetic number, because the mean of its divisors is an integer number (1321836).

2^2643671 is an apocalyptic number.

2643671 is a deficient number, since it is larger than the sum of its proper divisors (1).

2643671 is an equidigital number, since it uses as much as digits as its factorization.

2643671 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6048, while the sum is 29.

The square root of 2643671 is about 1625.9369606476. The cubic root of 2643671 is about 138.2724959496.

The spelling of 2643671 in words is "two million, six hundred forty-three thousand, six hundred seventy-one".