1020056563 has 2 divisors, whose sum is σ = 1020056564. Its totient is φ = 1020056562.

The previous prime is 1020056561. The next prime is 1020056567. The reversal of 1020056563 is 3656500201.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1020056563 - 2¹ = 1020056561 is a prime.

Together with 1020056561, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1020056561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510028281 + 510028282.

It is an arithmetic number, because the mean of its divisors is an integer number (510028282).

Almost surely, 2^1020056563 is an apocalyptic number.

1020056563 is a deficient number, since it is larger than the sum of its proper divisors (1).

1020056563 is an equidigital number, since it uses as much as digits as its factorization.

1020056563 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5400, while the sum is 28.

The square root of 1020056563 is about 31938.3243611809. The cubic root of 1020056563 is about 1006.6413162751.

Adding to 1020056563 its reverse (3656500201), we get a palindrome (4676556764).

The spelling of 1020056563 in words is "one billion, twenty million, fifty-six thousand, five hundred sixty-three".