27000005 has 4 divisors (see below), whose sum is σ = 32400012. Its totient is φ = 21600000.

The previous prime is 26999981. The next prime is 27000011. The reversal of 27000005 is 50000072.

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 16900321 + 10099684 = 4111^2 + 3178^2 .

It is not a de Polignac number, because 27000005 - 2¹² = 26995909 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2699996 + ... + 2700005.

It is an arithmetic number, because the mean of its divisors is an integer number (8100003).

Almost surely, 2^27000005 is an apocalyptic number.

It is an amenable number.

27000005 is a deficient number, since it is larger than the sum of its proper divisors (5400007).

27000005 is an equidigital number, since it uses as much as digits as its factorization.

27000005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5400006.

The product of its (nonzero) digits is 70, while the sum is 14.

The square root of 27000005 is about 5196.1529038318. The cubic root of 27000005 is about 300.0000185185. Note that the first 4 decimals are identical.

Adding to 27000005 its reverse (50000072), we get a palindrome (77000077).

It can be divided in two parts, 2 and 7000005, that added together give a palindrome (7000007).

The spelling of 27000005 in words is "twenty-seven million, five", and thus it is an aban number and an uban number.