863080813 has 4 divisors (see below), whose sum is σ = 986378080. Its totient is φ = 739783548.

The previous prime is 863080811. The next prime is 863080831. The reversal of 863080813 is 318080368.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 863080813 - 2¹ = 863080811 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 (863080811) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61648623 + ... + 61648636.

It is an arithmetic number, because the mean of its divisors is an integer number (246594520).

Almost surely, 2^863080813 is an apocalyptic number.

It is an amenable number.

863080813 is a deficient number, since it is larger than the sum of its proper divisors (123297267).

863080813 is a wasteful number, since it uses less digits than its factorization.

863080813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123297266.

The product of its (nonzero) digits is 27648, while the sum is 37.

The square root of 863080813 is about 29378.2370641943. The cubic root of 863080813 is about 952.1027524411.

The spelling of 863080813 in words is "eight hundred sixty-three million, eighty thousand, eight hundred thirteen".