27887317 has 2 divisors, whose sum is σ = 27887318. Its totient is φ = 27887316.

The previous prime is 27887311. The next prime is 27887329. The reversal of 27887317 is 71378872.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17589636 + 10297681 = 4194^2 + 3209^2 .

It is a cyclic number.

It is not a de Polignac number, because 27887317 - 2²³ = 19498709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27887311) 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, 13943658 + 13943659.

It is an arithmetic number, because the mean of its divisors is an integer number (13943659).

Almost surely, 2^27887317 is an apocalyptic number.

It is an amenable number.

27887317 is a deficient number, since it is larger than the sum of its proper divisors (1).

27887317 is an equidigital number, since it uses as much as digits as its factorization.

27887317 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 131712, while the sum is 43.

The square root of 27887317 is about 5280.8443453675. The cubic root of 27887317 is about 303.2510019547.

The spelling of 27887317 in words is "twenty-seven million, eight hundred eighty-seven thousand, three hundred seventeen".