868466813 has 2 divisors, whose sum is σ = 868466814. Its totient is φ = 868466812.

The previous prime is 868466791. The next prime is 868466869. The reversal of 868466813 is 318664868.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 733488889 + 134977924 = 27083^2 + 11618^2 .

It is a cyclic number.

It is not a de Polignac number, because 868466813 - 2¹⁰ = 868465789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (868466873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 434233406 + 434233407.

It is an arithmetic number, because the mean of its divisors is an integer number (434233407).

Almost surely, 2^868466813 is an apocalyptic number.

It is an amenable number.

868466813 is a deficient number, since it is larger than the sum of its proper divisors (1).

868466813 is an equidigital number, since it uses as much as digits as its factorization.

868466813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1327104, while the sum is 50.

The square root of 868466813 is about 29469.7609932622. The cubic root of 868466813 is about 954.0791587980.

The spelling of 868466813 in words is "eight hundred sixty-eight million, four hundred sixty-six thousand, eight hundred thirteen".