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6680309 = 19334613
BaseRepresentation
bin11001011110111011110101
3110120101122212
4121132323311
53202232214
6355103205
7110532056
oct31367365
913511585
106680309
113853019
1222a1b05
1314cb85c
14c5c72d
158be53e
hex65eef5

6680309 has 4 divisors (see below), whose sum is σ = 6715116. Its totient is φ = 6645504.

The previous prime is 6680287. The next prime is 6680321. The reversal of 6680309 is 9030866.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 2044900 + 4635409 = 1430^2 + 2153^2 .

It is a cyclic number.

It is not a de Polignac number, because 6680309 - 28 = 6680053 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6680329) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17114 + ... + 17499.

It is an arithmetic number, because the mean of its divisors is an integer number (1678779).

Almost surely, 26680309 is an apocalyptic number.

It is an amenable number.

6680309 is a deficient number, since it is larger than the sum of its proper divisors (34807).

6680309 is a wasteful number, since it uses less digits than its factorization.

6680309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34806.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 6680309 is about 2584.6293738175. The cubic root of 6680309 is about 188.3354975778.

The spelling of 6680309 in words is "six million, six hundred eighty thousand, three hundred nine".

Divisors: 1 193 34613 6680309