6850409 has 8 divisors (see below), whose sum is σ = 7221960. Its totient is φ = 6487936.

The previous prime is 6850379. The next prime is 6850421. The reversal of 6850409 is 9040586.

It can be written as a sum of positive squares in 4 ways, for example, as 2334784 + 4515625 = 1528^2 + 2125^2 .

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 6850409 - 2⁸ = 6850153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6850429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 692 + ... + 3765.

It is an arithmetic number, because the mean of its divisors is an integer number (902745).

Almost surely, 2^6850409 is an apocalyptic number.

It is an amenable number.

6850409 is a deficient number, since it is larger than the sum of its proper divisors (371551).

6850409 is a wasteful number, since it uses less digits than its factorization.

6850409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4539.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 6850409 is about 2617.3285999278. The cubic root of 6850409 is about 189.9206409115.

The spelling of 6850409 in words is "six million, eight hundred fifty thousand, four hundred nine".