6871912609 has 9 divisors (see below), whose sum is σ = 7254290673. Its totient is φ = 6508740852.

The previous prime is 6871912577. The next prime is 6871912613. The reversal of 6871912609 is 9062191786.

The square root of 6871912609 is 82897.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 6871912609 - 2⁵ = 6871912577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6871912679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1572862 + ... + 1577224.

It is an arithmetic number, because the mean of its divisors is an integer number (806032297).

Almost surely, 2^6871912609 is an apocalyptic number.

6871912609 is the 82897-th square number.

6871912609 is the 41449-th centered octagonal number.

It is an amenable number.

6871912609 is a deficient number, since it is larger than the sum of its proper divisors (382378064).

6871912609 is an frugal number, since it uses more digits than its factorization.

6871912609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8764 (or 4382 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 49.

The cubic root of 6871912609 is about 1901.1915525819.

Multiplying 6871912609 by its sum of digits (49), we get a square (336723717841 = 580279²).

The spelling of 6871912609 in words is "six billion, eight hundred seventy-one million, nine hundred twelve thousand, six hundred nine".