6880409 has 4 divisors (see below), whose sum is σ = 7066404. Its totient is φ = 6694416.

The previous prime is 6880369. The next prime is 6880411. The reversal of 6880409 is 9040886.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6615184 + 265225 = 2572^2 + 515^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6880409 is a prime.

It is an Ulam number.

It is a d-powerful number, because it can be written as 6³ + 8 + 8⁷ + 0 + 4³ + 0 + 9⁷ .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6880429) 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 3 ways as a sum of consecutive naturals, for example, 92942 + ... + 93015.

It is an arithmetic number, because the mean of its divisors is an integer number (1766601).

Almost surely, 2^6880409 is an apocalyptic number.

It is an amenable number.

6880409 is a deficient number, since it is larger than the sum of its proper divisors (185995).

6880409 is a wasteful number, since it uses less digits than its factorization.

6880409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185994.

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 6880409 is about 2623.0533734562. The cubic root of 6880409 is about 190.1974770444.

The spelling of 6880409 in words is "six million, eight hundred eighty thousand, four hundred nine".