27127681 has 4 divisors (see below), whose sum is σ = 31003072. Its totient is φ = 23252292.

The previous prime is 27127663. The next prime is 27127703. The reversal of 27127681 is 18672172.

It is a happy number.

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 27127681 - 2⁹ = 27127169 is a prime.

It is a super-2 number, since 2×27127681² = 1471822152875522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27127621) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1937685 + ... + 1937698.

It is an arithmetic number, because the mean of its divisors is an integer number (7750768).

Almost surely, 2^27127681 is an apocalyptic number.

It is an amenable number.

27127681 is a deficient number, since it is larger than the sum of its proper divisors (3875391).

27127681 is an equidigital number, since it uses as much as digits as its factorization.

27127681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3875390.

The product of its digits is 9408, while the sum is 34.

The square root of 27127681 is about 5208.4240418768. The cubic root of 27127681 is about 300.4721491201.

The spelling of 27127681 in words is "twenty-seven million, one hundred twenty-seven thousand, six hundred eighty-one".