6871609 has 8 divisors (see below), whose sum is σ = 7040520. Its totient is φ = 6704256.

The previous prime is 6871583. The next prime is 6871639. The reversal of 6871609 is 9061786.

It can be written as a sum of positive squares in 4 ways, for example, as 1452025 + 5419584 = 1205^2 + 2328^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6871609 - 2⁷ = 6871481 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6871639) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16597 + ... + 17005.

It is an arithmetic number, because the mean of its divisors is an integer number (880065).

Almost surely, 2^6871609 is an apocalyptic number.

It is an amenable number.

6871609 is a deficient number, since it is larger than the sum of its proper divisors (168911).

6871609 is a wasteful number, since it uses less digits than its factorization.

6871609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 779.

The product of its (nonzero) digits is 18144, while the sum is 37.

The square root of 6871609 is about 2621.3754023413. The cubic root of 6871609 is about 190.1163553227.

The spelling of 6871609 in words is "six million, eight hundred seventy-one thousand, six hundred nine".