864831105 has 12 divisors (see below), whose sum is σ = 1499040660. Its totient is φ = 461243232.

The previous prime is 864831101. The next prime is 864831131. The reversal of 864831105 is 501138468.

864831105 is a `hidden beast` number, since 8 + 648 + 3 + 1 + 1 + 0 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 180956304 + 683874801 = 13452^2 + 26151^2 .

It is not a de Polignac number, because 864831105 - 2² = 864831101 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 864831105.

It is not an unprimeable number, because it can be changed into a prime (864831101) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9609190 + ... + 9609279.

It is an arithmetic number, because the mean of its divisors is an integer number (124920055).

Almost surely, 2^864831105 is an apocalyptic number.

It is an amenable number.

864831105 is a deficient number, since it is larger than the sum of its proper divisors (634209555).

864831105 is a wasteful number, since it uses less digits than its factorization.

864831105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19218480 (or 19218477 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The square root of 864831105 is about 29408.0108983930. The cubic root of 864831105 is about 952.7459261241.

The spelling of 864831105 in words is "eight hundred sixty-four million, eight hundred thirty-one thousand, one hundred five".