1298117663 has 2 divisors, whose sum is σ = 1298117664. Its totient is φ = 1298117662.

The previous prime is 1298117647. The next prime is 1298117693. The reversal of 1298117663 is 3667118921.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1298117663 - 2⁴ = 1298117647 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1298117693) 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, 649058831 + 649058832.

It is an arithmetic number, because the mean of its divisors is an integer number (649058832).

Almost surely, 2^1298117663 is an apocalyptic number.

1298117663 is a deficient number, since it is larger than the sum of its proper divisors (1).

1298117663 is an equidigital number, since it uses as much as digits as its factorization.

1298117663 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108864, while the sum is 44.

The square root of 1298117663 is about 36029.3999811265. The cubic root of 1298117663 is about 1090.8658672801.

The spelling of 1298117663 in words is "one billion, two hundred ninety-eight million, one hundred seventeen thousand, six hundred sixty-three".