6867139 has 2 divisors, whose sum is σ = 6867140. Its totient is φ = 6867138.

The previous prime is 6867137. The next prime is 6867149. The reversal of 6867139 is 9317686.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6867139 - 2¹ = 6867137 is a prime.

Together with 6867137, it forms a pair of twin primes.

6867139 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (6867137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3433569 + 3433570.

It is an arithmetic number, because the mean of its divisors is an integer number (3433570).

Almost surely, 2^6867139 is an apocalyptic number.

6867139 is a deficient number, since it is larger than the sum of its proper divisors (1).

6867139 is an equidigital number, since it uses as much as digits as its factorization.

6867139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54432, while the sum is 40.

The square root of 6867139 is about 2620.5226577918. The cubic root of 6867139 is about 190.0751226485.

The spelling of 6867139 in words is "six million, eight hundred sixty-seven thousand, one hundred thirty-nine".