6849909 has 12 divisors (see below), whose sum is σ = 10793952. Its totient is φ = 4151400.

The previous prime is 6849893. The next prime is 6849917. The reversal of 6849909 is 9099486.

It is not a de Polignac number, because 6849909 - 2⁴ = 6849893 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6849919) 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 11 ways as a sum of consecutive naturals, for example, 34497 + ... + 34694.

It is an arithmetic number, because the mean of its divisors is an integer number (899496).

Almost surely, 2^6849909 is an apocalyptic number.

It is an amenable number.

6849909 is a deficient number, since it is larger than the sum of its proper divisors (3944043).

6849909 is a wasteful number, since it uses less digits than its factorization.

6849909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69208 (or 69205 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 45.

The square root of 6849909 is about 2617.2330809464. The cubic root of 6849909 is about 189.9160201348.

The spelling of 6849909 in words is "six million, eight hundred forty-nine thousand, nine hundred nine".