27434209 has 12 divisors (see below), whose sum is σ = 31931172. Its totient is φ = 23471360.

The previous prime is 27434189. The next prime is 27434213. The reversal of 27434209 is 90243472.

It can be written as a sum of positive squares in 2 ways, for example, as 14653584 + 12780625 = 3828^2 + 3575^2 .

It is not a de Polignac number, because 27434209 - 2⁵ = 27434177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27434249) 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, 4612 + ... + 8725.

It is an arithmetic number, because the mean of its divisors is an integer number (2660931).

Almost surely, 2^27434209 is an apocalyptic number.

It is an amenable number.

27434209 is a deficient number, since it is larger than the sum of its proper divisors (4496963).

27434209 is a wasteful number, since it uses less digits than its factorization.

27434209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13376 (or 13365 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 31.

The square root of 27434209 is about 5237.7675587983. The cubic root of 27434209 is about 301.5996368611.

The spelling of 27434209 in words is "twenty-seven million, four hundred thirty-four thousand, two hundred nine".