6967138891 has 2 divisors, whose sum is σ = 6967138892. Its totient is φ = 6967138890.

The previous prime is 6967138889. The next prime is 6967138921. The reversal of 6967138891 is 1988317696.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6967138891 - 2¹ = 6967138889 is a prime.

Together with 6967138889, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (6967138831) 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, 3483569445 + 3483569446.

It is an arithmetic number, because the mean of its divisors is an integer number (3483569446).

Almost surely, 2^6967138891 is an apocalyptic number.

6967138891 is a deficient number, since it is larger than the sum of its proper divisors (1).

6967138891 is an equidigital number, since it uses as much as digits as its factorization.

6967138891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3919104, while the sum is 58.

The square root of 6967138891 is about 83469.3889458884. The cubic root of 6967138891 is about 1909.9331035660.

The spelling of 6967138891 in words is "six billion, nine hundred sixty-seven million, one hundred thirty-eight thousand, eight hundred ninety-one".