868216389 has 12 divisors (see below), whose sum is σ = 1163132256. Its totient is φ = 576060448.

The previous prime is 868216361. The next prime is 868216429. The reversal of 868216389 is 983612868.

It is not a de Polignac number, because 868216389 - 2¹⁵ = 868183621 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (868216339) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 827137 + ... + 828185.

It is an arithmetic number, because the mean of its divisors is an integer number (96927688).

Almost surely, 2^868216389 is an apocalyptic number.

It is an amenable number.

868216389 is a deficient number, since it is larger than the sum of its proper divisors (294915867).

868216389 is an equidigital number, since it uses as much as digits as its factorization.

868216389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2364 (or 1315 counting only the distinct ones).

The product of its digits is 995328, while the sum is 51.

The square root of 868216389 is about 29465.5118570847. The cubic root of 868216389 is about 953.9874464900.

The spelling of 868216389 in words is "eight hundred sixty-eight million, two hundred sixteen thousand, three hundred eighty-nine".