27939189 has 4 divisors (see below), whose sum is σ = 37252256. Its totient is φ = 18626124.

The previous prime is 27939187. The next prime is 27939221. The reversal of 27939189 is 98193972.

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 not a de Polignac number, because 27939189 - 2¹ = 27939187 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27939187) 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, 4656529 + ... + 4656534.

It is an arithmetic number, because the mean of its divisors is an integer number (9313064).

Almost surely, 2^27939189 is an apocalyptic number.

It is an amenable number.

27939189 is a deficient number, since it is larger than the sum of its proper divisors (9313067).

27939189 is an equidigital number, since it uses as much as digits as its factorization.

27939189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9313066.

The product of its digits is 244944, while the sum is 48.

The square root of 27939189 is about 5285.7533994692. The cubic root of 27939189 is about 303.4389068841.

The spelling of 27939189 in words is "twenty-seven million, nine hundred thirty-nine thousand, one hundred eighty-nine".