27746561 has 2 divisors, whose sum is σ = 27746562. Its totient is φ = 27746560.

The previous prime is 27746557. The next prime is 27746573. The reversal of 27746561 is 16564772.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27667600 + 78961 = 5260^2 + 281^2 .

It is a cyclic number.

It is not a de Polignac number, because 27746561 - 2² = 27746557 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (27746501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13873280 + 13873281.

It is an arithmetic number, because the mean of its divisors is an integer number (13873281).

Almost surely, 2^27746561 is an apocalyptic number.

It is an amenable number.

27746561 is a deficient number, since it is larger than the sum of its proper divisors (1).

27746561 is an equidigital number, since it uses as much as digits as its factorization.

27746561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 70560, while the sum is 38.

The square root of 27746561 is about 5267.5004508780. The cubic root of 27746561 is about 302.7399403144.

The spelling of 27746561 in words is "twenty-seven million, seven hundred forty-six thousand, five hundred sixty-one".