864641727 has 12 divisors (see below), whose sum is σ = 1249659840. Its totient is φ = 576089568.

The previous prime is 864641719. The next prime is 864641747. The reversal of 864641727 is 727146468.

It is not a de Polignac number, because 864641727 - 2³ = 864641719 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (864641707) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11478 + ... + 43139.

It is an arithmetic number, because the mean of its divisors is an integer number (104138320).

Almost surely, 2^864641727 is an apocalyptic number.

864641727 is a deficient number, since it is larger than the sum of its proper divisors (385018113).

864641727 is a wasteful number, since it uses less digits than its factorization.

864641727 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56382 (or 56379 counting only the distinct ones).

The product of its digits is 451584, while the sum is 45.

The square root of 864641727 is about 29404.7908851602. The cubic root of 864641727 is about 952.6763779436.

The spelling of 864641727 in words is "eight hundred sixty-four million, six hundred forty-one thousand, seven hundred twenty-seven".