1298997563 has 2 divisors, whose sum is σ = 1298997564. Its totient is φ = 1298997562.

The previous prime is 1298997533. The next prime is 1298997577. The reversal of 1298997563 is 3657998921.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1298997563 - 2⁸ = 1298997307 is a prime.

It is not a weakly prime, because it can be changed into another prime (1298997533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 649498781 + 649498782.

It is an arithmetic number, because the mean of its divisors is an integer number (649498782).

Almost surely, 2^1298997563 is an apocalyptic number.

1298997563 is a deficient number, since it is larger than the sum of its proper divisors (1).

1298997563 is an equidigital number, since it uses as much as digits as its factorization.

1298997563 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7348320, while the sum is 59.

The square root of 1298997563 is about 36041.6087737493. The cubic root of 1298997563 is about 1091.1122846155.

The spelling of 1298997563 in words is "one billion, two hundred ninety-eight million, nine hundred ninety-seven thousand, five hundred sixty-three".