864873081 has 12 divisors (see below), whose sum is σ = 1266857280. Its totient is φ = 568460760.

The previous prime is 864873077. The next prime is 864873083. The reversal of 864873081 is 180378468.

It is not a de Polignac number, because 864873081 - 2² = 864873077 is a prime.

It is a super-2 number, since 2×864873081² = 1496010892476865122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (864873083) 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 11 ways as a sum of consecutive naturals, for example, 676101 + ... + 677378.

It is an arithmetic number, because the mean of its divisors is an integer number (105571440).

Almost surely, 2^864873081 is an apocalyptic number.

It is an amenable number.

864873081 is a deficient number, since it is larger than the sum of its proper divisors (401984199).

864873081 is a wasteful number, since it uses less digits than its factorization.

864873081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1353556 (or 1353553 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 45.

The square root of 864873081 is about 29408.7245728202. The cubic root of 864873081 is about 952.7613402382.

The spelling of 864873081 in words is "eight hundred sixty-four million, eight hundred seventy-three thousand, eighty-one".