27138577 has 4 divisors (see below), whose sum is σ = 28074420. Its totient is φ = 26202736.

The previous prime is 27138571. The next prime is 27138583. The reversal of 27138577 is 77583172.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (27138571) and next prime (27138583).

It can be written as a sum of positive squares in 2 ways, for example, as 9296401 + 17842176 = 3049^2 + 4224^2 .

It is a cyclic number.

It is not a de Polignac number, because 27138577 - 2³ = 27138569 is a prime.

It is a Smith number, since the sum of its digits (40) 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 not an unprimeable number, because it can be changed into a prime (27138571) 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, 467878 + ... + 467935.

It is an arithmetic number, because the mean of its divisors is an integer number (7018605).

Almost surely, 2^27138577 is an apocalyptic number.

It is an amenable number.

27138577 is a deficient number, since it is larger than the sum of its proper divisors (935843).

27138577 is an equidigital number, since it uses as much as digits as its factorization.

27138577 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 935842.

The product of its digits is 82320, while the sum is 40.

The square root of 27138577 is about 5209.4699346479. The cubic root of 27138577 is about 300.5123725645.

The spelling of 27138577 in words is "twenty-seven million, one hundred thirty-eight thousand, five hundred seventy-seven".