868624709893 has 2 divisors, whose sum is σ = 868624709894. Its totient is φ = 868624709892.

The previous prime is 868624709863. The next prime is 868624709899. The reversal of 868624709893 is 398907426868.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 525361133124 + 343263576769 = 724818^2 + 585887^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-868624709893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (868624709899) by changing a digit.

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 as a sum of consecutive naturals, namely, 434312354946 + 434312354947.

It is an arithmetic number, because the mean of its divisors is an integer number (434312354947).

Almost surely, 2^868624709893 is an apocalyptic number.

It is an amenable number.

868624709893 is a deficient number, since it is larger than the sum of its proper divisors (1).

868624709893 is an equidigital number, since it uses as much as digits as its factorization.

868624709893 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 250822656, while the sum is 70.

The spelling of 868624709893 in words is "eight hundred sixty-eight billion, six hundred twenty-four million, seven hundred nine thousand, eight hundred ninety-three".