6823561 has 2 divisors, whose sum is σ = 6823562. Its totient is φ = 6823560.

The previous prime is 6823549. The next prime is 6823567. The reversal of 6823561 is 1653286.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4665600 + 2157961 = 2160^2 + 1469^2 .

It is a cyclic number.

It is not a de Polignac number, because 6823561 - 2⁹ = 6823049 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (6823567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3411780 + 3411781.

It is an arithmetic number, because the mean of its divisors is an integer number (3411781).

Almost surely, 2^6823561 is an apocalyptic number.

It is an amenable number.

6823561 is a deficient number, since it is larger than the sum of its proper divisors (1).

6823561 is an equidigital number, since it uses as much as digits as its factorization.

6823561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8640, while the sum is 31.

The square root of 6823561 is about 2612.1946711530. The cubic root of 6823561 is about 189.6722048839.

The spelling of 6823561 in words is "six million, eight hundred twenty-three thousand, five hundred sixty-one".