864242647 has 8 divisors (see below), whose sum is σ = 871203200. Its totient is φ = 857292984.

The previous prime is 864242597. The next prime is 864242653. The reversal of 864242647 is 746242468.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-864242647 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (864242657) 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 7 ways as a sum of consecutive naturals, for example, 241054 + ... + 244612.

It is an arithmetic number, because the mean of its divisors is an integer number (108900400).

Almost surely, 2^864242647 is an apocalyptic number.

864242647 is a deficient number, since it is larger than the sum of its proper divisors (6960553).

864242647 is a wasteful number, since it uses less digits than its factorization.

864242647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5445.

The product of its digits is 516096, while the sum is 43.

The square root of 864242647 is about 29398.0041329339. The cubic root of 864242647 is about 952.5297844334.

The spelling of 864242647 in words is "eight hundred sixty-four million, two hundred forty-two thousand, six hundred forty-seven".