27716609 has 2 divisors, whose sum is σ = 27716610. Its totient is φ = 27716608.

The previous prime is 27716603. The next prime is 27716617. The reversal of 27716609 is 90661772.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14554225 + 13162384 = 3815^2 + 3628^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27716609 is a prime.

It is not a weakly prime, because it can be changed into another prime (27716603) 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 as a sum of consecutive naturals, namely, 13858304 + 13858305.

It is an arithmetic number, because the mean of its divisors is an integer number (13858305).

Almost surely, 2^27716609 is an apocalyptic number.

It is an amenable number.

27716609 is a deficient number, since it is larger than the sum of its proper divisors (1).

27716609 is an equidigital number, since it uses as much as digits as its factorization.

27716609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31752, while the sum is 38.

The square root of 27716609 is about 5264.6565889904. The cubic root of 27716609 is about 302.6309666719.

The spelling of 27716609 in words is "twenty-seven million, seven hundred sixteen thousand, six hundred nine".