863663217 has 8 divisors (see below), whose sum is σ = 1151719296. Its totient is φ = 575691312.

The previous prime is 863663191. The next prime is 863663231. The reversal of 863663217 is 712366368.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 863663217 - 2⁷ = 863663089 is a prime.

It is not an unprimeable number, because it can be changed into a prime (863663267) 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 7 ways as a sum of consecutive naturals, for example, 9048 + ... + 42534.

It is an arithmetic number, because the mean of its divisors is an integer number (143964912).

Almost surely, 2^863663217 is an apocalyptic number.

It is an amenable number.

863663217 is a deficient number, since it is larger than the sum of its proper divisors (288056079).

863663217 is a wasteful number, since it uses less digits than its factorization.

863663217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42087.

The product of its digits is 217728, while the sum is 42.

The square root of 863663217 is about 29388.1475598582. The cubic root of 863663217 is about 952.3168628554.

The spelling of 863663217 in words is "eight hundred sixty-three million, six hundred sixty-three thousand, two hundred seventeen".