6985439 has 2 divisors, whose sum is σ = 6985440. Its totient is φ = 6985438.

The previous prime is 6985427. The next prime is 6985441. The reversal of 6985439 is 9345896.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6985439 - 2⁸ = 6985183 is a prime.

Together with 6985441, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6985439.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6985409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3492719 + 3492720.

It is an arithmetic number, because the mean of its divisors is an integer number (3492720).

Almost surely, 2^6985439 is an apocalyptic number.

6985439 is a deficient number, since it is larger than the sum of its proper divisors (1).

6985439 is an equidigital number, since it uses as much as digits as its factorization.

6985439 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 233280, while the sum is 44.

The square root of 6985439 is about 2642.9981082097. The cubic root of 6985439 is about 191.1603871969.

The spelling of 6985439 in words is "six million, nine hundred eighty-five thousand, four hundred thirty-nine".