5640671 has 2 divisors, whose sum is σ = 5640672. Its totient is φ = 5640670.

The previous prime is 5640659. The next prime is 5640673. The reversal of 5640671 is 1760465.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 5640671 - 2¹⁴ = 5624287 is a prime.

It is a Sophie Germain prime.

Together with 5640673, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5640673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2820335 + 2820336.

It is an arithmetic number, because the mean of its divisors is an integer number (2820336).

Almost surely, 2^5640671 is an apocalyptic number.

5640671 is a deficient number, since it is larger than the sum of its proper divisors (1).

5640671 is an equidigital number, since it uses as much as digits as its factorization.

5640671 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 5640671 is about 2375.0096841908. The cubic root of 5640671 is about 178.0096678669.

The spelling of 5640671 in words is "five million, six hundred forty thousand, six hundred seventy-one".