1368991863 has 6 divisors (see below), whose sum is σ = 1977432704. Its totient is φ = 912661236.

The previous prime is 1368991831. The next prime is 1368991867. The reversal of 1368991863 is 3681998631.

It is not a de Polignac number, because 1368991863 - 2⁵ = 1368991831 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1368991867) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 76055095 + ... + 76055112.

Almost surely, 2^1368991863 is an apocalyptic number.

1368991863 is a deficient number, since it is larger than the sum of its proper divisors (608440841).

1368991863 is a wasteful number, since it uses less digits than its factorization.

1368991863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152110213 (or 152110210 counting only the distinct ones).

The product of its digits is 1679616, while the sum is 54.

The square root of 1368991863 is about 36999.8900403771. The cubic root of 1368991863 is about 1110.3680469316.

The spelling of 1368991863 in words is "one billion, three hundred sixty-eight million, nine hundred ninety-one thousand, eight hundred sixty-three".