1288647863 has 2 divisors, whose sum is σ = 1288647864. Its totient is φ = 1288647862.

The previous prime is 1288647859. The next prime is 1288647869. The reversal of 1288647863 is 3687468821.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1288647863 - 2² = 1288647859 is a prime.

It is a super-2 number, since 2×1288647863² = 3321226629628933538, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1288647869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 644323931 + 644323932.

It is an arithmetic number, because the mean of its divisors is an integer number (644323932).

Almost surely, 2^1288647863 is an apocalyptic number.

1288647863 is a deficient number, since it is larger than the sum of its proper divisors (1).

1288647863 is an equidigital number, since it uses as much as digits as its factorization.

1288647863 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3096576, while the sum is 53.

The square root of 1288647863 is about 35897.7417534864. The cubic root of 1288647863 is about 1088.2067596419.

The spelling of 1288647863 in words is "one billion, two hundred eighty-eight million, six hundred forty-seven thousand, eight hundred sixty-three".