6872809 has 8 divisors (see below), whose sum is σ = 7027328. Its totient is φ = 6719760.

The previous prime is 6872807. The next prime is 6872821. The reversal of 6872809 is 9082786.

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

It is not a de Polignac number, because 6872809 - 2¹ = 6872807 is a prime.

It is a super-3 number, since 3×6872809³ (a number of 21 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6872807) 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, 18544 + ... + 18910.

It is an arithmetic number, because the mean of its divisors is an integer number (878416).

Almost surely, 2^6872809 is an apocalyptic number.

It is an amenable number.

6872809 is a deficient number, since it is larger than the sum of its proper divisors (154519).

6872809 is a wasteful number, since it uses less digits than its factorization.

6872809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 735.

The product of its (nonzero) digits is 48384, while the sum is 40.

The square root of 6872809 is about 2621.6042798256. The cubic root of 6872809 is about 190.1274214523.

The spelling of 6872809 in words is "six million, eight hundred seventy-two thousand, eight hundred nine".