868628881 has 2 divisors, whose sum is σ = 868628882. Its totient is φ = 868628880.

The previous prime is 868628869. The next prime is 868628951. The reversal of 868628881 is 188826868.

It is a happy number.

868628881 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 796650625 + 71978256 = 28225^2 + 8484^2 .

It is a cyclic number.

It is not a de Polignac number, because 868628881 - 2¹¹ = 868626833 is a prime.

It is a super-2 number, since 2×868628881² = 1509032265814624322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (868628801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 434314440 + 434314441.

It is an arithmetic number, because the mean of its divisors is an integer number (434314441).

Almost surely, 2^868628881 is an apocalyptic number.

It is an amenable number.

868628881 is a deficient number, since it is larger than the sum of its proper divisors (1).

868628881 is an equidigital number, since it uses as much as digits as its factorization.

868628881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2359296, while the sum is 55.

The square root of 868628881 is about 29472.5105988614. The cubic root of 868628881 is about 954.1385032586.

The spelling of 868628881 in words is "eight hundred sixty-eight million, six hundred twenty-eight thousand, eight hundred eighty-one".