1321967863 has 2 divisors, whose sum is σ = 1321967864. Its totient is φ = 1321967862.

The previous prime is 1321967851. The next prime is 1321967893. The reversal of 1321967863 is 3687691231.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1321967863 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1321967893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660983931 + 660983932.

It is an arithmetic number, because the mean of its divisors is an integer number (660983932).

Almost surely, 2^1321967863 is an apocalyptic number.

1321967863 is a deficient number, since it is larger than the sum of its proper divisors (1).

1321967863 is an equidigital number, since it uses as much as digits as its factorization.

1321967863 is an evil number, because the sum of its binary digits is even.

The product of its digits is 326592, while the sum is 46.

The square root of 1321967863 is about 36358.8759864768. The cubic root of 1321967863 is about 1097.5061584017.

The spelling of 1321967863 in words is "one billion, three hundred twenty-one million, nine hundred sixty-seven thousand, eight hundred sixty-three".