6825309 has 4 divisors (see below), whose sum is σ = 9100416. Its totient is φ = 4550204.

The previous prime is 6825307. The next prime is 6825323. The reversal of 6825309 is 9035286.

It is a happy number.

6825309 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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.

It is a cyclic number.

It is not a de Polignac number, because 6825309 - 2¹ = 6825307 is a prime.

It is a D-number.

6825309 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 6825309.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6825307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1137549 + ... + 1137554.

It is an arithmetic number, because the mean of its divisors is an integer number (2275104).

Almost surely, 2^6825309 is an apocalyptic number.

It is an amenable number.

6825309 is a deficient number, since it is larger than the sum of its proper divisors (2275107).

6825309 is a wasteful number, since it uses less digits than its factorization.

6825309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2275106.

The product of its (nonzero) digits is 12960, while the sum is 33.

The square root of 6825309 is about 2612.5292342862. The cubic root of 6825309 is about 189.6883996883.

The spelling of 6825309 in words is "six million, eight hundred twenty-five thousand, three hundred nine".