6445811 has 2 divisors, whose sum is σ = 6445812. Its totient is φ = 6445810.

The previous prime is 6445793. The next prime is 6445823. The reversal of 6445811 is 1185446.

6445811 is digitally balanced in base 3, 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 6445811 - 2¹⁰ = 6444787 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (6445841) 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, 3222905 + 3222906.

It is an arithmetic number, because the mean of its divisors is an integer number (3222906).

Almost surely, 2^6445811 is an apocalyptic number.

6445811 is a deficient number, since it is larger than the sum of its proper divisors (1).

6445811 is an equidigital number, since it uses as much as digits as its factorization.

6445811 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3840, while the sum is 29.

The square root of 6445811 is about 2538.8601773237. The cubic root of 6445811 is about 186.1054918594.

The spelling of 6445811 in words is "six million, four hundred forty-five thousand, eight hundred eleven".