27391489 has 4 divisors (see below), whose sum is σ = 27403056. Its totient is φ = 27379924.

The previous prime is 27391453. The next prime is 27391493. The reversal of 27391489 is 98419372.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 27391489 - 2⁷ = 27391361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27391439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 799 + ... + 7444.

It is an arithmetic number, because the mean of its divisors is an integer number (6850764).

Almost surely, 2^27391489 is an apocalyptic number.

It is an amenable number.

27391489 is a deficient number, since it is larger than the sum of its proper divisors (11567).

27391489 is an equidigital number, since it uses as much as digits as its factorization.

27391489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11566.

The product of its digits is 108864, while the sum is 43.

The square root of 27391489 is about 5233.6878966939. The cubic root of 27391489 is about 301.4430072311.

The spelling of 27391489 in words is "twenty-seven million, three hundred ninety-one thousand, four hundred eighty-nine".