6942891 has 4 divisors (see below), whose sum is σ = 9257192. Its totient is φ = 4628592.

The previous prime is 6942883. The next prime is 6942907. The reversal of 6942891 is 1982496.

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

It is not a de Polignac number, because 6942891 - 2³ = 6942883 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6942821) 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, 1157146 + ... + 1157151.

It is an arithmetic number, because the mean of its divisors is an integer number (2314298).

Almost surely, 2^6942891 is an apocalyptic number.

6942891 is a deficient number, since it is larger than the sum of its proper divisors (2314301).

6942891 is a wasteful number, since it uses less digits than its factorization.

6942891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2314300.

The product of its digits is 31104, while the sum is 39.

The square root of 6942891 is about 2634.9366216287. The cubic root of 6942891 is about 190.7714800315.

The spelling of 6942891 in words is "six million, nine hundred forty-two thousand, eight hundred ninety-one".