6823544489 has 2 divisors, whose sum is σ = 6823544490. Its totient is φ = 6823544488.

The previous prime is 6823544479. The next prime is 6823544491. The reversal of 6823544489 is 9844453286.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5763390889 + 1060153600 = 75917^2 + 32560^2 .

It is a cyclic number.

It is not a de Polignac number, because 6823544489 - 2²⁴ = 6806767273 is a prime.

It is a super-2 number, since 2×6823544489² = 93121518786724542242, which contains 22 as substring.

Together with 6823544491, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6823544489.

It is not a weakly prime, because it can be changed into another prime (6823544479) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3411772244 + 3411772245.

It is an arithmetic number, because the mean of its divisors is an integer number (3411772245).

Almost surely, 2^6823544489 is an apocalyptic number.

It is an amenable number.

6823544489 is a deficient number, since it is larger than the sum of its proper divisors (1).

6823544489 is an equidigital number, since it uses as much as digits as its factorization.

6823544489 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6635520, while the sum is 53.

The square root of 6823544489 is about 82604.7485862647. The cubic root of 6823544489 is about 1896.7205190024.

The spelling of 6823544489 in words is "six billion, eight hundred twenty-three million, five hundred forty-four thousand, four hundred eighty-nine".