6887667289 has 2 divisors, whose sum is σ = 6887667290. Its totient is φ = 6887667288.

The previous prime is 6887667251. The next prime is 6887667299. The reversal of 6887667289 is 9827667886.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6539471689 + 348195600 = 80867^2 + 18660^2 .

It is a cyclic number.

It is not a de Polignac number, because 6887667289 - 2⁷ = 6887667161 is a prime.

It is not a weakly prime, because it can be changed into another prime (6887667209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3443833644 + 3443833645.

It is an arithmetic number, because the mean of its divisors is an integer number (3443833645).

Almost surely, 2^6887667289 is an apocalyptic number.

It is an amenable number.

6887667289 is a deficient number, since it is larger than the sum of its proper divisors (1).

6887667289 is an equidigital number, since it uses as much as digits as its factorization.

6887667289 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 97542144, while the sum is 67.

The square root of 6887667289 is about 82991.9712321620. The cubic root of 6887667289 is about 1902.6433465401.

The spelling of 6887667289 in words is "six billion, eight hundred eighty-seven million, six hundred sixty-seven thousand, two hundred eighty-nine".