27887161 has 2 divisors, whose sum is σ = 27887162. Its totient is φ = 27887160.

The previous prime is 27887143. The next prime is 27887173. The reversal of 27887161 is 16178872.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15327225 + 12559936 = 3915^2 + 3544^2 .

It is a cyclic number.

It is not a de Polignac number, because 27887161 - 2¹⁷ = 27756089 is a prime.

It is not a weakly prime, because it can be changed into another prime (27887131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13943580 + 13943581.

It is an arithmetic number, because the mean of its divisors is an integer number (13943581).

Almost surely, 2^27887161 is an apocalyptic number.

It is an amenable number.

27887161 is a deficient number, since it is larger than the sum of its proper divisors (1).

27887161 is an equidigital number, since it uses as much as digits as its factorization.

27887161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 37632, while the sum is 40.

The square root of 27887161 is about 5280.8295749816. The cubic root of 27887161 is about 303.2504364976.

The spelling of 27887161 in words is "twenty-seven million, eight hundred eighty-seven thousand, one hundred sixty-one".