868608905 has 8 divisors (see below), whose sum is σ = 1042499592. Its totient is φ = 694774528.

The previous prime is 868608893. The next prime is 868608913. The reversal of 868608905 is 509806868.

It can be written as a sum of positive squares in 4 ways, for example, as 135932281 + 732676624 = 11659^2 + 27068^2 .

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 868608905 - 2⁴ = 868608889 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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, 36179 + ... + 55191.

It is an arithmetic number, because the mean of its divisors is an integer number (130312449).

Almost surely, 2^868608905 is an apocalyptic number.

It is an amenable number.

868608905 is a deficient number, since it is larger than the sum of its proper divisors (173890687).

868608905 is a wasteful number, since it uses less digits than its factorization.

868608905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28155.

The product of its (nonzero) digits is 829440, while the sum is 50.

The square root of 868608905 is about 29472.1717048473. The cubic root of 868608905 is about 954.1311890430.

The spelling of 868608905 in words is "eight hundred sixty-eight million, six hundred eight thousand, nine hundred five".