864541831 has 8 divisors (see below), whose sum is σ = 868970880. Its totient is φ = 860124672.

The previous prime is 864541807. The next prime is 864541849. The reversal of 864541831 is 138145468.

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-864541831 is a prime.

It is a super-2 number, since 2×864541831² = 1494865155097665122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (864541801) 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, 166531 + ... + 171643.

It is an arithmetic number, because the mean of its divisors is an integer number (108621360).

Almost surely, 2^864541831 is an apocalyptic number.

864541831 is a deficient number, since it is larger than the sum of its proper divisors (4429049).

864541831 is a wasteful number, since it uses less digits than its factorization.

864541831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5945.

The product of its digits is 92160, while the sum is 40.

The square root of 864541831 is about 29403.0922013315. The cubic root of 864541831 is about 952.6396875157.

The spelling of 864541831 in words is "eight hundred sixty-four million, five hundred forty-one thousand, eight hundred thirty-one".