27081391 has 8 divisors (see below), whose sum is σ = 28773360. Its totient is φ = 25400448.

The previous prime is 27081371. The next prime is 27081407. The reversal of 27081391 is 19318072.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 27081391 - 2¹⁹ = 26557103 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 (27081371) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2625 + ... + 7813.

It is an arithmetic number, because the mean of its divisors is an integer number (3596670).

Almost surely, 2^27081391 is an apocalyptic number.

27081391 is a deficient number, since it is larger than the sum of its proper divisors (1691969).

27081391 is a wasteful number, since it uses less digits than its factorization.

27081391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5513.

The product of its (nonzero) digits is 3024, while the sum is 31.

The square root of 27081391 is about 5203.9783819689. The cubic root of 27081391 is about 300.3011457511.

It can be divided in two parts, 27081 and 391, that added together give a palindrome (27472).

The spelling of 27081391 in words is "twenty-seven million, eighty-one thousand, three hundred ninety-one".