6563957 has 2 divisors, whose sum is σ = 6563958. Its totient is φ = 6563956.

The previous prime is 6563939. The next prime is 6563981. The reversal of 6563957 is 7593656.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5340721 + 1223236 = 2311^2 + 1106^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6563957 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6563857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3281978 + 3281979.

It is an arithmetic number, because the mean of its divisors is an integer number (3281979).

Almost surely, 2^6563957 is an apocalyptic number.

It is an amenable number.

6563957 is a deficient number, since it is larger than the sum of its proper divisors (1).

6563957 is an equidigital number, since it uses as much as digits as its factorization.

6563957 is an evil number, because the sum of its binary digits is even.

The product of its digits is 170100, while the sum is 41.

The square root of 6563957 is about 2562.0220529886. The cubic root of 6563957 is about 187.2356642578.

The spelling of 6563957 in words is "six million, five hundred sixty-three thousand, nine hundred fifty-seven".