864859673 has 2 divisors, whose sum is σ = 864859674. Its totient is φ = 864859672.

The previous prime is 864859661. The next prime is 864859679. The reversal of 864859673 is 376958468.

864859673 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 574225369 + 290634304 = 23963^2 + 17048^2 .

It is a cyclic number.

It is not a de Polignac number, because 864859673 - 2⁴ = 864859657 is a prime.

It is not a weakly prime, because it can be changed into another prime (864859679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 432429836 + 432429837.

It is an arithmetic number, because the mean of its divisors is an integer number (432429837).

Almost surely, 2^864859673 is an apocalyptic number.

It is an amenable number.

864859673 is a deficient number, since it is larger than the sum of its proper divisors (1).

864859673 is an equidigital number, since it uses as much as digits as its factorization.

864859673 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8709120, while the sum is 56.

The square root of 864859673 is about 29408.4966123738. The cubic root of 864859673 is about 952.7564167066.

The spelling of 864859673 in words is "eight hundred sixty-four million, eight hundred fifty-nine thousand, six hundred seventy-three".