6441569 has 2 divisors, whose sum is σ = 6441570. Its totient is φ = 6441568.

The previous prime is 6441563. The next prime is 6441571. The reversal of 6441569 is 9651446.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3751969 + 2689600 = 1937^2 + 1640^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6441569 is a prime.

It is a super-2 number, since 2×6441569² = 82987622363522, which contains 22 as substring.

Together with 6441571, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (6441563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3220784 + 3220785.

It is an arithmetic number, because the mean of its divisors is an integer number (3220785).

Almost surely, 2^6441569 is an apocalyptic number.

It is an amenable number.

6441569 is a deficient number, since it is larger than the sum of its proper divisors (1).

6441569 is an equidigital number, since it uses as much as digits as its factorization.

6441569 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25920, while the sum is 35.

The square root of 6441569 is about 2538.0246255701. The cubic root of 6441569 is about 186.0646574456.

The spelling of 6441569 in words is "six million, four hundred forty-one thousand, five hundred sixty-nine".