868713215 has 4 divisors (see below), whose sum is σ = 1042455864. Its totient is φ = 694970568.

The previous prime is 868713211. The next prime is 868713257. The reversal of 868713215 is 512317868.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 868713215 - 2² = 868713211 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 (868713211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86871317 + ... + 86871326.

It is an arithmetic number, because the mean of its divisors is an integer number (260613966).

Almost surely, 2^868713215 is an apocalyptic number.

868713215 is a deficient number, since it is larger than the sum of its proper divisors (173742649).

868713215 is a wasteful number, since it uses less digits than its factorization.

868713215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173742648.

The product of its digits is 80640, while the sum is 41.

The square root of 868713215 is about 29473.9412871777. The cubic root of 868713215 is about 954.1693809304.

The spelling of 868713215 in words is "eight hundred sixty-eight million, seven hundred thirteen thousand, two hundred fifteen".