27516649 has 2 divisors, whose sum is σ = 27516650. Its totient is φ = 27516648.

The previous prime is 27516647. The next prime is 27516653. The reversal of 27516649 is 94661572.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27457600 + 59049 = 5240^2 + 243^2 .

It is a cyclic number.

It is not a de Polignac number, because 27516649 - 2¹ = 27516647 is a prime.

Together with 27516647, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (27516647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13758324 + 13758325.

It is an arithmetic number, because the mean of its divisors is an integer number (13758325).

Almost surely, 2^27516649 is an apocalyptic number.

It is an amenable number.

27516649 is a deficient number, since it is larger than the sum of its proper divisors (1).

27516649 is an equidigital number, since it uses as much as digits as its factorization.

27516649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 90720, while the sum is 40.

The square root of 27516649 is about 5245.6314205251. The cubic root of 27516649 is about 301.9014378010.

The spelling of 27516649 in words is "twenty-seven million, five hundred sixteen thousand, six hundred forty-nine".