868558609 has 8 divisors (see below), whose sum is σ = 938983040. Its totient is φ = 800605296.

The previous prime is 868558573. The next prime is 868558631. The reversal of 868558609 is 906855868.

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

It is a cyclic number.

It is not a de Polignac number, because 868558609 - 2¹⁵ = 868525841 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 868558609.

It is not an unprimeable number, because it can be changed into a prime (868558699) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 617049 + ... + 618454.

It is an arithmetic number, because the mean of its divisors is an integer number (117372880).

Almost surely, 2^868558609 is an apocalyptic number.

It is an amenable number.

868558609 is a deficient number, since it is larger than the sum of its proper divisors (70424431).

868558609 is a wasteful number, since it uses less digits than its factorization.

868558609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1235559.

The product of its (nonzero) digits is 4147200, while the sum is 55.

The square root of 868558609 is about 29471.3184129927. The cubic root of 868558609 is about 954.1127726578.

The spelling of 868558609 in words is "eight hundred sixty-eight million, five hundred fifty-eight thousand, six hundred nine".