6687957139 has 2 divisors, whose sum is σ = 6687957140. Its totient is φ = 6687957138.

The previous prime is 6687957103. The next prime is 6687957161. The reversal of 6687957139 is 9317597866.

6687957139 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6687957139 - 2¹⁵ = 6687924371 is a prime.

It is not a weakly prime, because it can be changed into another prime (6687957179) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3343978569 + 3343978570.

It is an arithmetic number, because the mean of its divisors is an integer number (3343978570).

Almost surely, 2^6687957139 is an apocalyptic number.

6687957139 is a deficient number, since it is larger than the sum of its proper divisors (1).

6687957139 is an equidigital number, since it uses as much as digits as its factorization.

6687957139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17146080, while the sum is 61.

The square root of 6687957139 is about 81779.9311506191. The cubic root of 6687957139 is about 1884.0734389079.

The spelling of 6687957139 in words is "six billion, six hundred eighty-seven million, nine hundred fifty-seven thousand, one hundred thirty-nine".