868613905 has 16 divisors (see below), whose sum is σ = 1068853968. Its totient is φ = 677248000.

The previous prime is 868613897. The next prime is 868613917. The reversal of 868613905 is 509316868.

It can be written as a sum of positive squares in 8 ways, for example, as 107516161 + 761097744 = 10369^2 + 27588^2 .

It is not a de Polignac number, because 868613905 - 2³ = 868613897 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 302175 + ... + 305035.

It is an arithmetic number, because the mean of its divisors is an integer number (66803373).

Almost surely, 2^868613905 is an apocalyptic number.

It is an amenable number.

868613905 is a deficient number, since it is larger than the sum of its proper divisors (200240063).

868613905 is a wasteful number, since it uses less digits than its factorization.

868613905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4388.

The product of its (nonzero) digits is 311040, while the sum is 46.

The square root of 868613905 is about 29472.2565305068. The cubic root of 868613905 is about 954.1330198043.

The spelling of 868613905 in words is "eight hundred sixty-eight million, six hundred thirteen thousand, nine hundred five".