868315513 has 4 divisors (see below), whose sum is σ = 935109028. Its totient is φ = 801522000.

The previous prime is 868315489. The next prime is 868315517. The reversal of 868315513 is 315513868.

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

It can be written as a sum of positive squares in 2 ways, for example, as 187470864 + 680844649 = 13692^2 + 26093^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-868315513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (868315517) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33396738 + ... + 33396763.

It is an arithmetic number, because the mean of its divisors is an integer number (233777257).

Almost surely, 2^868315513 is an apocalyptic number.

It is an amenable number.

868315513 is a deficient number, since it is larger than the sum of its proper divisors (66793515).

868315513 is a wasteful number, since it uses less digits than its factorization.

868315513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66793514.

The product of its digits is 86400, while the sum is 40.

The square root of 868315513 is about 29467.1938433235. The cubic root of 868315513 is about 954.0237505935.

The spelling of 868315513 in words is "eight hundred sixty-eight million, three hundred fifteen thousand, five hundred thirteen".