6939309 has 12 divisors (see below), whose sum is σ = 10019616. Its totient is φ = 4270032.

The previous prime is 6939301. The next prime is 6939337. The reversal of 6939309 is 9039396.

It is not a de Polignac number, because 6939309 - 2³ = 6939301 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Curzon number.

6939309 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6939301) 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 11 ways as a sum of consecutive naturals, for example, 6337 + ... + 7350.

It is an arithmetic number, because the mean of its divisors is an integer number (834968).

Almost surely, 2^6939309 is an apocalyptic number.

It is an amenable number.

6939309 is a deficient number, since it is larger than the sum of its proper divisors (3080307).

6939309 is a wasteful number, since it uses less digits than its factorization.

6939309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13716 (or 13703 counting only the distinct ones).

The product of its (nonzero) digits is 39366, while the sum is 39.

The square root of 6939309 is about 2634.2568211926. The cubic root of 6939309 is about 190.7386665636.

The spelling of 6939309 in words is "six million, nine hundred thirty-nine thousand, three hundred nine".