6939109 has 4 divisors (see below), whose sum is σ = 6945120. Its totient is φ = 6933100.

The previous prime is 6939103. The next prime is 6939137. The reversal of 6939109 is 9019396.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6939109 is a prime.

It is a Duffinian number.

6939109 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6939103) 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, 667 + ... + 3784.

It is an arithmetic number, because the mean of its divisors is an integer number (1736280).

Almost surely, 2^6939109 is an apocalyptic number.

It is an amenable number.

6939109 is a deficient number, since it is larger than the sum of its proper divisors (6011).

6939109 is a wasteful number, since it uses less digits than its factorization.

6939109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6010.

The product of its (nonzero) digits is 13122, while the sum is 37.

The square root of 6939109 is about 2634.2188595483. The cubic root of 6939109 is about 190.7368340997.

The spelling of 6939109 in words is "six million, nine hundred thirty-nine thousand, one hundred nine".