868381317 has 20 divisors (see below), whose sum is σ = 1299402060. Its totient is φ = 577943424.

The previous prime is 868381313. The next prime is 868381321. The reversal of 868381317 is 713183868.

It is an interprime number because it is at equal distance from previous prime (868381313) and next prime (868381321).

It can be written as a sum of positive squares in 2 ways, for example, as 1726596 + 866654721 = 1314^2 + 29439^2 .

It is not a de Polignac number, because 868381317 - 2² = 868381313 is a prime.

It is a super-2 number, since 2×868381317² = 1508172223429308978, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (868381313) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 40909 + ... + 58397.

It is an arithmetic number, because the mean of its divisors is an integer number (64970103).

Almost surely, 2^868381317 is an apocalyptic number.

It is an amenable number.

868381317 is a deficient number, since it is larger than the sum of its proper divisors (431020743).

868381317 is a wasteful number, since it uses less digits than its factorization.

868381317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18114 (or 18105 counting only the distinct ones).

The product of its digits is 193536, while the sum is 45.

The square root of 868381317 is about 29468.3103859044. The cubic root of 868381317 is about 954.0478497419.

It can be divided in two parts, 8683 and 81317, that added together give a square (90000 = 300²).

The spelling of 868381317 in words is "eight hundred sixty-eight million, three hundred eighty-one thousand, three hundred seventeen".