6689239 has 2 divisors, whose sum is σ = 6689240. Its totient is φ = 6689238.

The previous prime is 6689237. The next prime is 6689257. The reversal of 6689239 is 9329866.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6689239 - 2¹ = 6689237 is a prime.

Together with 6689237, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 6689195 and 6689204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6689233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3344619 + 3344620.

It is an arithmetic number, because the mean of its divisors is an integer number (3344620).

Almost surely, 2^6689239 is an apocalyptic number.

6689239 is a deficient number, since it is larger than the sum of its proper divisors (1).

6689239 is an equidigital number, since it uses as much as digits as its factorization.

6689239 is an evil number, because the sum of its binary digits is even.

The product of its digits is 139968, while the sum is 43.

The square root of 6689239 is about 2586.3563172927. The cubic root of 6689239 is about 188.4193802816.

The spelling of 6689239 in words is "six million, six hundred eighty-nine thousand, two hundred thirty-nine".