27657013 has 4 divisors (see below), whose sum is σ = 27686988. Its totient is φ = 27627040.

The previous prime is 27656983. The next prime is 27657029. The reversal of 27657013 is 31075672.

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 21316689 + 6340324 = 4617^2 + 2518^2 .

It is a cyclic number.

It is not a de Polignac number, because 27657013 - 2²¹ = 25559861 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27657313) 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, 13558 + ... + 15463.

It is an arithmetic number, because the mean of its divisors is an integer number (6921747).

Almost surely, 2^27657013 is an apocalyptic number.

It is an amenable number.

27657013 is a deficient number, since it is larger than the sum of its proper divisors (29975).

27657013 is an equidigital number, since it uses as much as digits as its factorization.

27657013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29974.

The product of its (nonzero) digits is 8820, while the sum is 31.

The square root of 27657013 is about 5258.9935348886. The cubic root of 27657013 is about 302.4139062418.

The spelling of 27657013 in words is "twenty-seven million, six hundred fifty-seven thousand, thirteen".