863000820999 has 12 divisors (see below), whose sum is σ = 1261575498456. Its totient is φ = 568402146672.

The previous prime is 863000820967. The next prime is 863000821061. The reversal of 863000820999 is 999028000368.

It is not a de Polignac number, because 863000820999 - 2⁵ = 863000820967 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (863000820949) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 577643712 + ... + 577645205.

It is an arithmetic number, because the mean of its divisors is an integer number (105131291538).

Almost surely, 2^863000820999 is an apocalyptic number.

863000820999 is a deficient number, since it is larger than the sum of its proper divisors (398574677457).

863000820999 is a wasteful number, since it uses less digits than its factorization.

863000820999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1155289006 (or 1155289003 counting only the distinct ones).

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

The spelling of 863000820999 in words is "eight hundred sixty-three billion, eight hundred twenty thousand, nine hundred ninety-nine".