864535887 has 6 divisors (see below), whose sum is σ = 1248774072. Its totient is φ = 576357252.

The previous prime is 864535883. The next prime is 864535913. The reversal of 864535887 is 788535468.

864535887 is a `hidden beast` number, since 8 + 6 + 4 + 53 + 588 + 7 = 666.

It is not a de Polignac number, because 864535887 - 2² = 864535883 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (864535883) 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 5 ways as a sum of consecutive naturals, for example, 48029763 + ... + 48029780.

It is an arithmetic number, because the mean of its divisors is an integer number (208129012).

Almost surely, 2^864535887 is an apocalyptic number.

864535887 is a deficient number, since it is larger than the sum of its proper divisors (384238185).

864535887 is a wasteful number, since it uses less digits than its factorization.

864535887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96059549 (or 96059546 counting only the distinct ones).

The product of its digits is 6451200, while the sum is 54.

The square root of 864535887 is about 29402.9911233534. The cubic root of 864535887 is about 952.6375042771.

The spelling of 864535887 in words is "eight hundred sixty-four million, five hundred thirty-five thousand, eight hundred eighty-seven".