864830689 has 2 divisors, whose sum is σ = 864830690. Its totient is φ = 864830688.

The previous prime is 864830683. The next prime is 864830693. The reversal of 864830689 is 986038468.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 864830464 + 225 = 29408^2 + 15^2 .

It is a cyclic number.

It is not a de Polignac number, because 864830689 - 2²¹ = 862733537 is a prime.

It is not a weakly prime, because it can be changed into another prime (864830683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 432415344 + 432415345.

It is an arithmetic number, because the mean of its divisors is an integer number (432415345).

Almost surely, 2^864830689 is an apocalyptic number.

It is an amenable number.

864830689 is a deficient number, since it is larger than the sum of its proper divisors (1).

864830689 is an equidigital number, since it uses as much as digits as its factorization.

864830689 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1990656, while the sum is 52.

The square root of 864830689 is about 29408.0038254894. The cubic root of 864830689 is about 952.7457733612.

The spelling of 864830689 in words is "eight hundred sixty-four million, eight hundred thirty thousand, six hundred eighty-nine".