863432811 has 16 divisors (see below), whose sum is σ = 1334776320. Its totient is φ = 550594440.

The previous prime is 863432809. The next prime is 863432849. The reversal of 863432811 is 118234368.

863432811 is a `hidden beast` number, since 8 + 634 + 3 + 2 + 8 + 11 = 666.

It is not a de Polignac number, because 863432811 - 2¹ = 863432809 is a prime.

It is a super-2 number, since 2×863432811² = 1491032438222723442, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (863432861) 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, 694575 + ... + 695816.

It is an arithmetic number, because the mean of its divisors is an integer number (83423520).

Almost surely, 2^863432811 is an apocalyptic number.

863432811 is a deficient number, since it is larger than the sum of its proper divisors (471343509).

863432811 is a wasteful number, since it uses less digits than its factorization.

863432811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1390423 (or 1390417 counting only the distinct ones).

The product of its digits is 27648, while the sum is 36.

The square root of 863432811 is about 29384.2272486448. The cubic root of 863432811 is about 952.2321697213.

The spelling of 863432811 in words is "eight hundred sixty-three million, four hundred thirty-two thousand, eight hundred eleven".