864159747 has 16 divisors (see below), whose sum is σ = 1287619200. Its totient is φ = 510958400.

The previous prime is 864159743. The next prime is 864159757. The reversal of 864159747 is 747951468.

It is not a de Polignac number, because 864159747 - 2² = 864159743 is a prime.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 864159747.

It is not an unprimeable number, because it can be changed into a prime (864159743) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 317997 + ... + 320702.

It is an arithmetic number, because the mean of its divisors is an integer number (80476200).

Almost surely, 2^864159747 is an apocalyptic number.

864159747 is a deficient number, since it is larger than the sum of its proper divisors (423459453).

864159747 is a wasteful number, since it uses less digits than its factorization.

864159747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 638754.

The product of its digits is 1693440, while the sum is 51.

The square root of 864159747 is about 29396.5941394577. The cubic root of 864159747 is about 952.4993272293.

The spelling of 864159747 in words is "eight hundred sixty-four million, one hundred fifty-nine thousand, seven hundred forty-seven".