27133809 has 16 divisors (see below), whose sum is σ = 36842688. Its totient is φ = 17760512.

The previous prime is 27133801. The next prime is 27133823. The reversal of 27133809 is 90833172.

It is a cyclic number.

It is not a de Polignac number, because 27133809 - 2³ = 27133801 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 27133809.

It is not an unprimeable number, because it can be changed into a prime (27133801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43669 + ... + 44285.

It is an arithmetic number, because the mean of its divisors is an integer number (2302668).

Almost surely, 2^27133809 is an apocalyptic number.

It is an amenable number.

27133809 is a deficient number, since it is larger than the sum of its proper divisors (9708879).

27133809 is a wasteful number, since it uses less digits than its factorization.

27133809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 864.

The product of its (nonzero) digits is 9072, while the sum is 33.

The square root of 27133809 is about 5209.0122864128. The cubic root of 27133809 is about 300.4947724411.

The spelling of 27133809 in words is "twenty-seven million, one hundred thirty-three thousand, eight hundred nine".