6909849 has 6 divisors (see below), whose sum is σ = 9980906. Its totient is φ = 4606560.

The previous prime is 6909841. The next prime is 6909887. The reversal of 6909849 is 9489096.

It can be written as a sum of positive squares in only one way, i.e., 5322249 + 1587600 = 2307^2 + 1260^2 .

It is not a de Polignac number, because 6909849 - 2³ = 6909841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6909841) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 383872 + ... + 383889.

Almost surely, 2^6909849 is an apocalyptic number.

It is an amenable number.

6909849 is a deficient number, since it is larger than the sum of its proper divisors (3071057).

6909849 is a wasteful number, since it uses less digits than its factorization.

6909849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 767767 (or 767764 counting only the distinct ones).

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

The square root of 6909849 is about 2628.6591639085. The cubic root of 6909849 is about 190.4683643501.

The spelling of 6909849 in words is "six million, nine hundred nine thousand, eight hundred forty-nine".