27726761 has 2 divisors, whose sum is σ = 27726762. Its totient is φ = 27726760.

The previous prime is 27726749. The next prime is 27726763. The reversal of 27726761 is 16762772.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22505536 + 5221225 = 4744^2 + 2285^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27726761 is a prime.

It is a super-2 number, since 2×27726761² = 1537546551102242, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 27726763, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (27726763) 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, 13863380 + 13863381.

It is an arithmetic number, because the mean of its divisors is an integer number (13863381).

Almost surely, 2^27726761 is an apocalyptic number.

It is an amenable number.

27726761 is a deficient number, since it is larger than the sum of its proper divisors (1).

27726761 is an equidigital number, since it uses as much as digits as its factorization.

27726761 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 49392, while the sum is 38.

The square root of 27726761 is about 5265.6206661703. The cubic root of 27726761 is about 302.6679112412.

The spelling of 27726761 in words is "twenty-seven million, seven hundred twenty-six thousand, seven hundred sixty-one".