864706889 has 4 divisors (see below), whose sum is σ = 865687056. Its totient is φ = 863726724.

The previous prime is 864706883. The next prime is 864706897. The reversal of 864706889 is 988607468.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-864706889 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (864706883) 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 in 3 ways as a sum of consecutive naturals, for example, 488759 + ... + 490524.

It is an arithmetic number, because the mean of its divisors is an integer number (216421764).

Almost surely, 2^864706889 is an apocalyptic number.

It is an amenable number.

864706889 is a deficient number, since it is larger than the sum of its proper divisors (980167).

864706889 is an equidigital number, since it uses as much as digits as its factorization.

864706889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 980166.

The product of its (nonzero) digits is 4644864, while the sum is 56.

The square root of 864706889 is about 29405.8988810069. The cubic root of 864706889 is about 952.7003095277.

The spelling of 864706889 in words is "eight hundred sixty-four million, seven hundred six thousand, eight hundred eighty-nine".