27689329 has 4 divisors (see below), whose sum is σ = 27974884. Its totient is φ = 27403776.

The previous prime is 27689279. The next prime is 27689351. The reversal of 27689329 is 92398672.

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 15800625 + 11888704 = 3975^2 + 3448^2 .

It is a cyclic number.

It is not a de Polignac number, because 27689329 - 2⁷ = 27689201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27689029) 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, 142632 + ... + 142825.

It is an arithmetic number, because the mean of its divisors is an integer number (6993721).

Almost surely, 2^27689329 is an apocalyptic number.

It is an amenable number.

27689329 is a deficient number, since it is larger than the sum of its proper divisors (285555).

27689329 is an equidigital number, since it uses as much as digits as its factorization.

27689329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285554.

The product of its digits is 326592, while the sum is 46.

The square root of 27689329 is about 5262.0650889171. The cubic root of 27689329 is about 302.5316461667.

The spelling of 27689329 in words is "twenty-seven million, six hundred eighty-nine thousand, three hundred twenty-nine".