27935561 has 2 divisors, whose sum is σ = 27935562. Its totient is φ = 27935560.

The previous prime is 27935513. The next prime is 27935599. The reversal of 27935561 is 16553972.

It is a happy number.

It is an a-pointer prime, because the next prime (27935599) can be obtained adding 27935561 to its sum of digits (38).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21529600 + 6405961 = 4640^2 + 2531^2 .

It is a cyclic number.

It is not a de Polignac number, because 27935561 - 2¹⁰ = 27934537 is a prime.

It is not a weakly prime, because it can be changed into another prime (27935161) 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, 13967780 + 13967781.

It is an arithmetic number, because the mean of its divisors is an integer number (13967781).

Almost surely, 2^27935561 is an apocalyptic number.

It is an amenable number.

27935561 is a deficient number, since it is larger than the sum of its proper divisors (1).

27935561 is an equidigital number, since it uses as much as digits as its factorization.

27935561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 56700, while the sum is 38.

The square root of 27935561 is about 5285.4102016778. The cubic root of 27935561 is about 303.4257721195.

The spelling of 27935561 in words is "twenty-seven million, nine hundred thirty-five thousand, five hundred sixty-one".