12956563 has 2 divisors, whose sum is σ = 12956564. Its totient is φ = 12956562.

The previous prime is 12956509. The next prime is 12956597. The reversal of 12956563 is 36565921.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12956563 - 2¹³ = 12948371 is a prime.

It is not a weakly prime, because it can be changed into another prime (12956063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6478281 + 6478282.

It is an arithmetic number, because the mean of its divisors is an integer number (6478282).

Almost surely, 2^12956563 is an apocalyptic number.

12956563 is a deficient number, since it is larger than the sum of its proper divisors (1).

12956563 is an equidigital number, since it uses as much as digits as its factorization.

12956563 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48600, while the sum is 37.

The square root of 12956563 is about 3599.5226072356. The cubic root of 12956563 is about 234.8712921280.

The spelling of 12956563 in words is "twelve million, nine hundred fifty-six thousand, five hundred sixty-three".