27305909 has 2 divisors, whose sum is σ = 27305910. Its totient is φ = 27305908.

The previous prime is 27305897. The next prime is 27305939. The reversal of 27305909 is 90950372.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22061809 + 5244100 = 4697^2 + 2290^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27305909 is a prime.

It is a super-2 number, since 2×27305909² = 1491225332632562, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27305939) 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 as a sum of consecutive naturals, namely, 13652954 + 13652955.

It is an arithmetic number, because the mean of its divisors is an integer number (13652955).

Almost surely, 2^27305909 is an apocalyptic number.

It is an amenable number.

27305909 is a deficient number, since it is larger than the sum of its proper divisors (1).

27305909 is an equidigital number, since it uses as much as digits as its factorization.

27305909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17010, while the sum is 35.

The square root of 27305909 is about 5225.5056214686. The cubic root of 27305909 is about 301.1287440926.

The spelling of 27305909 in words is "twenty-seven million, three hundred five thousand, nine hundred nine".