863868799 has 16 divisors (see below), whose sum is σ = 914457600. Its totient is φ = 814428736.

The previous prime is 863868779. The next prime is 863868809. The reversal of 863868799 is 997868368.

It is a cyclic number.

It is not a de Polignac number, because 863868799 - 2⁵ = 863868767 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 863868799.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (863868779) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1029222 + ... + 1030060.

It is an arithmetic number, because the mean of its divisors is an integer number (57153600).

Almost surely, 2^863868799 is an apocalyptic number.

863868799 is a gapful number since it is divisible by the number (89) formed by its first and last digit.

863868799 is a deficient number, since it is larger than the sum of its proper divisors (50588801).

863868799 is a wasteful number, since it uses less digits than its factorization.

863868799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1454.

The product of its digits is 31352832, while the sum is 64.

The square root of 863868799 is about 29391.6450543347. The cubic root of 863868799 is about 952.3924184151.

The spelling of 863868799 in words is "eight hundred sixty-three million, eight hundred sixty-eight thousand, seven hundred ninety-nine".