27138269 has 4 divisors (see below), whose sum is σ = 27800220. Its totient is φ = 26476320.

The previous prime is 27138263. The next prime is 27138271. The reversal of 27138269 is 96283172.

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 4452100 + 22686169 = 2110^2 + 4763^2 .

It is a cyclic number.

It is not a de Polignac number, because 27138269 - 2⁴ = 27138253 is a prime.

It is a super-2 number, since 2×27138269² = 1472971288632722, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27138263) 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, 330914 + ... + 330995.

It is an arithmetic number, because the mean of its divisors is an integer number (6950055).

Almost surely, 2^27138269 is an apocalyptic number.

It is an amenable number.

27138269 is a deficient number, since it is larger than the sum of its proper divisors (661951).

27138269 is an equidigital number, since it uses as much as digits as its factorization.

27138269 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 661950.

The product of its digits is 36288, while the sum is 38.

The square root of 27138269 is about 5209.4403730151. The cubic root of 27138269 is about 300.5112357060.

The spelling of 27138269 in words is "twenty-seven million, one hundred thirty-eight thousand, two hundred sixty-nine".