6919139 has 4 divisors (see below), whose sum is σ = 7157760. Its totient is φ = 6680520.

The previous prime is 6919117. The next prime is 6919141. The reversal of 6919139 is 9319196.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6919139 - 2¹² = 6915043 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6919109) 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 in 3 ways as a sum of consecutive naturals, for example, 119267 + ... + 119324.

It is an arithmetic number, because the mean of its divisors is an integer number (1789440).

Almost surely, 2^6919139 is an apocalyptic number.

6919139 is a deficient number, since it is larger than the sum of its proper divisors (238621).

6919139 is a wasteful number, since it uses less digits than its factorization.

6919139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238620.

The product of its digits is 13122, while the sum is 38.

The square root of 6919139 is about 2630.4256309578. The cubic root of 6919139 is about 190.5536850140.

The spelling of 6919139 in words is "six million, nine hundred nineteen thousand, one hundred thirty-nine".