1368993663 has 16 divisors (see below), whose sum is σ = 2147441760. Its totient is φ = 858976128.

The previous prime is 1368993653. The next prime is 1368993679. The reversal of 1368993663 is 3663998631.

It is a happy number.

It is not a de Polignac number, because 1368993663 - 2²⁰ = 1367945087 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1368993653) 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 in 15 ways as a sum of consecutive naturals, for example, 1490820 + ... + 1491737.

It is an arithmetic number, because the mean of its divisors is an integer number (134215110).

Almost surely, 2^1368993663 is an apocalyptic number.

1368993663 is a deficient number, since it is larger than the sum of its proper divisors (778448097).

1368993663 is a wasteful number, since it uses less digits than its factorization.

1368993663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2982583 (or 2982577 counting only the distinct ones).

The product of its digits is 3779136, while the sum is 54.

The square root of 1368993663 is about 36999.9143647658. The cubic root of 1368993663 is about 1110.3685335821.

The spelling of 1368993663 in words is "one billion, three hundred sixty-eight million, nine hundred ninety-three thousand, six hundred sixty-three".