816000863 has 4 divisors (see below), whose sum is σ = 816069480. Its totient is φ = 815932248.

The previous prime is 816000841. The next prime is 816000881. The reversal of 816000863 is 368000618.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 368000618 = 2 ⋅184000309.

It is a cyclic number.

It is not a de Polignac number, because 816000863 - 2⁸ = 816000607 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 (816009863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11348 + ... + 41961.

It is an arithmetic number, because the mean of its divisors is an integer number (204017370).

Almost surely, 2^816000863 is an apocalyptic number.

816000863 is a deficient number, since it is larger than the sum of its proper divisors (68617).

816000863 is a wasteful number, since it uses less digits than its factorization.

816000863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68616.

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 816000863 is about 28565.7288196888. The cubic root of 816000863 is about 934.4660751006.

The spelling of 816000863 in words is "eight hundred sixteen million, eight hundred sixty-three", and thus it is an aban number.