6996687839 has 2 divisors, whose sum is σ = 6996687840. Its totient is φ = 6996687838.

The previous prime is 6996687833. The next prime is 6996687869. The reversal of 6996687839 is 9387866996.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6996687839 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6996687833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3498343919 + 3498343920.

It is an arithmetic number, because the mean of its divisors is an integer number (3498343920).

Almost surely, 2^6996687839 is an apocalyptic number.

6996687839 is a deficient number, since it is larger than the sum of its proper divisors (1).

6996687839 is an equidigital number, since it uses as much as digits as its factorization.

6996687839 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 211631616, while the sum is 71.

The square root of 6996687839 is about 83646.2063634687. The cubic root of 6996687839 is about 1912.6294239325.

The spelling of 6996687839 in words is "six billion, nine hundred ninety-six million, six hundred eighty-seven thousand, eight hundred thirty-nine".