1312634663 has 2 divisors, whose sum is σ = 1312634664. Its totient is φ = 1312634662.

The previous prime is 1312634657. The next prime is 1312634693. The reversal of 1312634663 is 3664362131.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1312634663 - 2⁴ = 1312634647 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1312634693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656317331 + 656317332.

It is an arithmetic number, because the mean of its divisors is an integer number (656317332).

Almost surely, 2^1312634663 is an apocalyptic number.

1312634663 is a deficient number, since it is larger than the sum of its proper divisors (1).

1312634663 is an equidigital number, since it uses as much as digits as its factorization.

1312634663 is an evil number, because the sum of its binary digits is even.

The product of its digits is 46656, while the sum is 35.

The square root of 1312634663 is about 36230.3003437730. The cubic root of 1312634663 is about 1094.9172287191.

Adding to 1312634663 its reverse (3664362131), we get a palindrome (4976996794).

The spelling of 1312634663 in words is "one billion, three hundred twelve million, six hundred thirty-four thousand, six hundred sixty-three".