6849439 has 4 divisors (see below), whose sum is σ = 6893224. Its totient is φ = 6805656.

The previous prime is 6849421. The next prime is 6849463. The reversal of 6849439 is 9349486.

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

It is a cyclic number.

It is not a de Polignac number, because 6849439 - 2⁵ = 6849407 is a prime.

It is a super-2 number, since 2×6849439² = 93829629229442, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6849395 and 6849404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6849499) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21657 + ... + 21970.

It is an arithmetic number, because the mean of its divisors is an integer number (1723306).

Almost surely, 2^6849439 is an apocalyptic number.

6849439 is a deficient number, since it is larger than the sum of its proper divisors (43785).

6849439 is a wasteful number, since it uses less digits than its factorization.

6849439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43784.

The product of its digits is 186624, while the sum is 43.

The square root of 6849439 is about 2617.1432899251. The cubic root of 6849439 is about 189.9116763997.

The spelling of 6849439 in words is "six million, eight hundred forty-nine thousand, four hundred thirty-nine".