27000009 has 12 divisors (see below), whose sum is σ = 39056836. Its totient is φ = 17973792.

The previous prime is 26999981. The next prime is 27000011. The reversal of 27000009 is 90000072.

It can be written as a sum of positive squares in 2 ways, for example, as 14040009 + 12960000 = 3747^2 + 3600^2 .

It is not a de Polignac number, because 27000009 - 2¹⁶ = 26934473 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 26999955 and 27000000.

It is not an unprimeable number, because it can be changed into a prime (27000049) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5919 + ... + 9435.

Almost surely, 2^27000009 is an apocalyptic number.

It is an amenable number.

27000009 is a deficient number, since it is larger than the sum of its proper divisors (12056827).

27000009 is a wasteful number, since it uses less digits than its factorization.

27000009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4376 (or 4373 counting only the distinct ones).

The product of its (nonzero) digits is 126, while the sum is 18.

The square root of 27000009 is about 5196.1532887320. The cubic root of 27000009 is about 300.0000333333. Note that the first 4 decimals are identical.

It can be divided in two parts, 2700000 and 9, that multiplied together give a 5-th power (24300000 = 30⁵).

The spelling of 27000009 in words is "twenty-seven million, nine", and thus it is an aban number and an uban number.