6876409 has 2 divisors, whose sum is σ = 6876410. Its totient is φ = 6876408.

The previous prime is 6876403. The next prime is 6876433. The reversal of 6876409 is 9046786.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6110784 + 765625 = 2472^2 + 875^2 .

It is a cyclic number.

It is not a de Polignac number, because 6876409 - 2⁵ = 6876377 is a prime.

6876409 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (6876403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3438204 + 3438205.

It is an arithmetic number, because the mean of its divisors is an integer number (3438205).

Almost surely, 2^6876409 is an apocalyptic number.

It is an amenable number.

6876409 is a deficient number, since it is larger than the sum of its proper divisors (1).

6876409 is an equidigital number, since it uses as much as digits as its factorization.

6876409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72576, while the sum is 40.

The square root of 6876409 is about 2622.2907924180. The cubic root of 6876409 is about 190.1606121144.

The spelling of 6876409 in words is "six million, eight hundred seventy-six thousand, four hundred nine".