6879209 has 4 divisors (see below), whose sum is σ = 6933504. Its totient is φ = 6824916.

The previous prime is 6879193. The next prime is 6879227. The reversal of 6879209 is 9029786.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9029786 = 2 ⋅4514893.

It is a cyclic number.

It is not a de Polignac number, because 6879209 - 2⁴ = 6879193 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6879259) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26957 + ... + 27210.

It is an arithmetic number, because the mean of its divisors is an integer number (1733376).

Almost surely, 2^6879209 is an apocalyptic number.

It is an amenable number.

6879209 is a deficient number, since it is larger than the sum of its proper divisors (54295).

6879209 is a wasteful number, since it uses less digits than its factorization.

6879209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54294.

The product of its (nonzero) digits is 54432, while the sum is 41.

The square root of 6879209 is about 2622.8246224252. The cubic root of 6879209 is about 190.1864190660.

The spelling of 6879209 in words is "six million, eight hundred seventy-nine thousand, two hundred nine".