6806439 has 6 divisors (see below), whose sum is σ = 9831536. Its totient is φ = 4537620.

The previous prime is 6806431. The next prime is 6806467. The reversal of 6806439 is 9346086.

6806439 is a `hidden beast` number, since 6 + 8 + 0 + 643 + 9 = 666.

It is not a de Polignac number, because 6806439 - 2³ = 6806431 is a prime.

It is a super-2 number, since 2×6806439² = 92655223721442, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6806431) 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, 378127 + ... + 378144.

Almost surely, 2^6806439 is an apocalyptic number.

6806439 is a deficient number, since it is larger than the sum of its proper divisors (3025097).

6806439 is a wasteful number, since it uses less digits than its factorization.

6806439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 756277 (or 756274 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 6806439 is about 2608.9152918407. The cubic root of 6806439 is about 189.5134272016.

The spelling of 6806439 in words is "six million, eight hundred six thousand, four hundred thirty-nine".