1312320563 has 2 divisors, whose sum is σ = 1312320564. Its totient is φ = 1312320562.

The previous prime is 1312320533. The next prime is 1312320601. The reversal of 1312320563 is 3650232131.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1312320563 - 2¹⁶ = 1312255027 is a prime.

It is not a weakly prime, because it can be changed into another prime (1312320523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656160281 + 656160282.

It is an arithmetic number, because the mean of its divisors is an integer number (656160282).

Almost surely, 2^1312320563 is an apocalyptic number.

1312320563 is a deficient number, since it is larger than the sum of its proper divisors (1).

1312320563 is an equidigital number, since it uses as much as digits as its factorization.

1312320563 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3240, while the sum is 26.

The square root of 1312320563 is about 36225.9653149505. The cubic root of 1312320563 is about 1094.8298876011.

Adding to 1312320563 its reverse (3650232131), we get a palindrome (4962552694).

The spelling of 1312320563 in words is "one billion, three hundred twelve million, three hundred twenty thousand, five hundred sixty-three".