27171139 has 4 divisors (see below), whose sum is σ = 27683856. Its totient is φ = 26658424.

The previous prime is 27171127. The next prime is 27171143. The reversal of 27171139 is 93117172.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 27171139 - 2¹¹ = 27169091 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 27171139.

It is not an unprimeable number, because it can be changed into a prime (27171439) 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 in 3 ways as a sum of consecutive naturals, for example, 256279 + ... + 256384.

It is an arithmetic number, because the mean of its divisors is an integer number (6920964).

Almost surely, 2^27171139 is an apocalyptic number.

27171139 is a deficient number, since it is larger than the sum of its proper divisors (512717).

27171139 is an equidigital number, since it uses as much as digits as its factorization.

27171139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 512716.

The product of its digits is 2646, while the sum is 31.

The square root of 27171139 is about 5212.5942677327. The cubic root of 27171139 is about 300.6325136326.

The spelling of 27171139 in words is "twenty-seven million, one hundred seventy-one thousand, one hundred thirty-nine".