27969189 has 4 divisors (see below), whose sum is σ = 37292256. Its totient is φ = 18646124.

The previous prime is 27969167. The next prime is 27969191. The reversal of 27969189 is 98196972.

It is a happy number.

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 27969189 - 2⁵ = 27969157 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27969119) 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, 4661529 + ... + 4661534.

It is an arithmetic number, because the mean of its divisors is an integer number (9323064).

Almost surely, 2^27969189 is an apocalyptic number.

It is an amenable number.

27969189 is a deficient number, since it is larger than the sum of its proper divisors (9323067).

27969189 is an equidigital number, since it uses as much as digits as its factorization.

27969189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9323066.

The product of its digits is 489888, while the sum is 51.

The square root of 27969189 is about 5288.5904549322. The cubic root of 27969189 is about 303.5474749477.

The spelling of 27969189 in words is "twenty-seven million, nine hundred sixty-nine thousand, one hundred eighty-nine".