6563983 has 2 divisors, whose sum is σ = 6563984. Its totient is φ = 6563982.

The previous prime is 6563981. The next prime is 6564001. The reversal of 6563983 is 3893656.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6563983 - 2¹ = 6563981 is a prime.

Together with 6563981, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6563981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3281991 + 3281992.

It is an arithmetic number, because the mean of its divisors is an integer number (3281992).

Almost surely, 2^6563983 is an apocalyptic number.

6563983 is a deficient number, since it is larger than the sum of its proper divisors (1).

6563983 is an equidigital number, since it uses as much as digits as its factorization.

6563983 is an evil number, because the sum of its binary digits is even.

The product of its digits is 116640, while the sum is 40.

The square root of 6563983 is about 2562.0271271007. The cubic root of 6563983 is about 187.2359114726.

The spelling of 6563983 in words is "six million, five hundred sixty-three thousand, nine hundred eighty-three".