863247217 has 16 divisors (see below), whose sum is σ = 997650432. Its totient is φ = 731641680.

The previous prime is 863247211. The next prime is 863247241. The reversal of 863247217 is 712742368.

It is not a de Polignac number, because 863247217 - 2²⁷ = 729029489 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 863247217.

It is not an unprimeable number, because it can be changed into a prime (863247211) 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, 741678 + ... + 742840.

It is an arithmetic number, because the mean of its divisors is an integer number (62353152).

Almost surely, 2^863247217 is an apocalyptic number.

It is an amenable number.

863247217 is a deficient number, since it is larger than the sum of its proper divisors (134403215).

863247217 is a wasteful number, since it uses less digits than its factorization.

863247217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2268.

The product of its digits is 112896, while the sum is 40.

The square root of 863247217 is about 29381.0690241182. The cubic root of 863247217 is about 952.1639377218.

The spelling of 863247217 in words is "eight hundred sixty-three million, two hundred forty-seven thousand, two hundred seventeen".