6725309 has 2 divisors, whose sum is σ = 6725310. Its totient is φ = 6725308.

The previous prime is 6725281. The next prime is 6725317. The reversal of 6725309 is 9035276.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6604900 + 120409 = 2570^2 + 347^2 .

It is a cyclic number.

It is not a de Polignac number, because 6725309 - 2¹² = 6721213 is a prime.

It is a super-2 number, since 2×6725309² = 90459562290962, which contains 22 as substring.

It is a Chen prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6725339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3362654 + 3362655.

It is an arithmetic number, because the mean of its divisors is an integer number (3362655).

Almost surely, 2^6725309 is an apocalyptic number.

It is an amenable number.

6725309 is a deficient number, since it is larger than the sum of its proper divisors (1).

6725309 is an equidigital number, since it uses as much as digits as its factorization.

6725309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11340, while the sum is 32.

The square root of 6725309 is about 2593.3200728024. The cubic root of 6725309 is about 188.7574410469.

The spelling of 6725309 in words is "six million, seven hundred twenty-five thousand, three hundred nine".