27377561 has 2 divisors, whose sum is σ = 27377562. Its totient is φ = 27377560.

The previous prime is 27377509. The next prime is 27377569. The reversal of 27377561 is 16577372.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27040000 + 337561 = 5200^2 + 581^2 .

It is a cyclic number.

It is not a de Polignac number, because 27377561 - 2¹⁰ = 27376537 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (27377569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13688780 + 13688781.

It is an arithmetic number, because the mean of its divisors is an integer number (13688781).

Almost surely, 2^27377561 is an apocalyptic number.

It is an amenable number.

27377561 is a deficient number, since it is larger than the sum of its proper divisors (1).

27377561 is an equidigital number, since it uses as much as digits as its factorization.

27377561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 61740, while the sum is 38.

The square root of 27377561 is about 5232.3571170171. The cubic root of 27377561 is about 301.3919060779.

The spelling of 27377561 in words is "twenty-seven million, three hundred seventy-seven thousand, five hundred sixty-one".