6689935039 has 2 divisors, whose sum is σ = 6689935040. Its totient is φ = 6689935038.

The previous prime is 6689935037. The next prime is 6689935061. The reversal of 6689935039 is 9305399866.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6689935039 - 2¹ = 6689935037 is a prime.

Together with 6689935037, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6689935033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3344967519 + 3344967520.

It is an arithmetic number, because the mean of its divisors is an integer number (3344967520).

Almost surely, 2^6689935039 is an apocalyptic number.

6689935039 is a deficient number, since it is larger than the sum of its proper divisors (1).

6689935039 is an equidigital number, since it uses as much as digits as its factorization.

6689935039 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9447840, while the sum is 58.

The square root of 6689935039 is about 81792.0230768258. The cubic root of 6689935039 is about 1884.2591528949.

The spelling of 6689935039 in words is "six billion, six hundred eighty-nine million, nine hundred thirty-five thousand, thirty-nine".