864847731 has 16 divisors (see below), whose sum is σ = 1291961088. Its totient is φ = 509983200.

The previous prime is 864847729. The next prime is 864847741. The reversal of 864847731 is 137748468.

It is not a de Polignac number, because 864847731 - 2¹ = 864847729 is a prime.

It is a super-2 number, since 2×864847731² = 1495923195631696722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (864847741) 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, 352935 + ... + 355376.

It is an arithmetic number, because the mean of its divisors is an integer number (80747568).

Almost surely, 2^864847731 is an apocalyptic number.

864847731 is a deficient number, since it is larger than the sum of its proper divisors (427113357).

864847731 is a wasteful number, since it uses less digits than its factorization.

864847731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 708362.

The product of its digits is 903168, while the sum is 48.

The square root of 864847731 is about 29408.2935751124. The cubic root of 864847731 is about 952.7520314597.

The spelling of 864847731 in words is "eight hundred sixty-four million, eight hundred forty-seven thousand, seven hundred thirty-one".