1263863863 has 2 divisors, whose sum is σ = 1263863864. Its totient is φ = 1263863862.

The previous prime is 1263863851. The next prime is 1263863891. The reversal of 1263863863 is 3683683621.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1263863863 - 2²⁹ = 726992951 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1263863833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 631931931 + 631931932.

It is an arithmetic number, because the mean of its divisors is an integer number (631931932).

Almost surely, 2^1263863863 is an apocalyptic number.

1263863863 is a deficient number, since it is larger than the sum of its proper divisors (1).

1263863863 is an equidigital number, since it uses as much as digits as its factorization.

1263863863 is an evil number, because the sum of its binary digits is even.

The product of its digits is 746496, while the sum is 46.

The square root of 1263863863 is about 35550.8630415634. The cubic root of 1263863863 is about 1081.1852166160.

The spelling of 1263863863 in words is "one billion, two hundred sixty-three million, eight hundred sixty-three thousand, eight hundred sixty-three".