864344712089 has 2 divisors, whose sum is σ = 864344712090. Its totient is φ = 864344712088.

The previous prime is 864344712043. The next prime is 864344712197. The reversal of 864344712089 is 980217443468.

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., 601878052864 + 262466659225 = 775808^2 + 512315^2 .

It is a cyclic number.

It is not a de Polignac number, because 864344712089 - 2¹⁶ = 864344646553 is a prime.

It is not a weakly prime, because it can be changed into another prime (864344712689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 432172356044 + 432172356045.

It is an arithmetic number, because the mean of its divisors is an integer number (432172356045).

Almost surely, 2^864344712089 is an apocalyptic number.

It is an amenable number.

864344712089 is a deficient number, since it is larger than the sum of its proper divisors (1).

864344712089 is an equidigital number, since it uses as much as digits as its factorization.

864344712089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9289728, while the sum is 56.

The spelling of 864344712089 in words is "eight hundred sixty-four billion, three hundred forty-four million, seven hundred twelve thousand, eighty-nine".