27121189 has 4 divisors (see below), whose sum is σ = 28548640. Its totient is φ = 25693740.

The previous prime is 27121181. The next prime is 27121201. The reversal of 27121189 is 98112172.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 27121189 - 2³ = 27121181 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 27121189.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27121181) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 713697 + ... + 713734.

It is an arithmetic number, because the mean of its divisors is an integer number (7137160).

Almost surely, 2^27121189 is an apocalyptic number.

It is an amenable number.

27121189 is a deficient number, since it is larger than the sum of its proper divisors (1427451).

27121189 is a wasteful number, since it uses less digits than its factorization.

27121189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1427450.

The product of its digits is 2016, while the sum is 31.

The square root of 27121189 is about 5207.8007834402. The cubic root of 27121189 is about 300.4481782689.

The spelling of 27121189 in words is "twenty-seven million, one hundred twenty-one thousand, one hundred eighty-nine".