27189157 has 4 divisors (see below), whose sum is σ = 27387756. Its totient is φ = 26990560.

The previous prime is 27189143. The next prime is 27189161. The reversal of 27189157 is 75198172.

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

It can be written as a sum of positive squares in 2 ways, for example, as 12397441 + 14791716 = 3521^2 + 3846^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27189157 is a prime.

It is a Smith number, since the sum of its digits (40) 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 congruent number.

It is not an unprimeable number, because it can be changed into a prime (27189257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 99094 + ... + 99367.

It is an arithmetic number, because the mean of its divisors is an integer number (6846939).

Almost surely, 2^27189157 is an apocalyptic number.

It is an amenable number.

27189157 is a deficient number, since it is larger than the sum of its proper divisors (198599).

27189157 is a wasteful number, since it uses less digits than its factorization.

27189157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198598.

The product of its digits is 35280, while the sum is 40.

The square root of 27189157 is about 5214.3222953707. The cubic root of 27189157 is about 300.6989517715.

The spelling of 27189157 in words is "twenty-seven million, one hundred eighty-nine thousand, one hundred fifty-seven".