27491329 has 4 divisors (see below), whose sum is σ = 29108484. Its totient is φ = 25874176.

The previous prime is 27491323. The next prime is 27491339. The reversal of 27491329 is 92319472.

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 23280625 + 4210704 = 4825^2 + 2052^2 .

It is a cyclic number.

It is not a de Polignac number, because 27491329 - 2⁷ = 27491201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27491323) 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, 808552 + ... + 808585.

It is an arithmetic number, because the mean of its divisors is an integer number (7277121).

Almost surely, 2^27491329 is an apocalyptic number.

It is an amenable number.

27491329 is a deficient number, since it is larger than the sum of its proper divisors (1617155).

27491329 is a wasteful number, since it uses less digits than its factorization.

27491329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1617154.

The product of its digits is 27216, while the sum is 37.

The square root of 27491329 is about 5243.2174282591. The cubic root of 27491329 is about 301.8088091499.

The spelling of 27491329 in words is "twenty-seven million, four hundred ninety-one thousand, three hundred twenty-nine".