27116991 has 16 divisors (see below), whose sum is σ = 43825920. Its totient is φ = 16434360.

The previous prime is 27116963. The next prime is 27116993. The reversal of 27116991 is 19961172.

It is not a de Polignac number, because 27116991 - 2⁶ = 27116927 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27116993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45355 + ... + 45948.

It is an arithmetic number, because the mean of its divisors is an integer number (2739120).

Almost surely, 2^27116991 is an apocalyptic number.

27116991 is a deficient number, since it is larger than the sum of its proper divisors (16708929).

27116991 is a wasteful number, since it uses less digits than its factorization.

27116991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91323 (or 91317 counting only the distinct ones).

The product of its digits is 6804, while the sum is 36.

The square root of 27116991 is about 5207.3977186307. The cubic root of 27116991 is about 300.4326756725.

The spelling of 27116991 in words is "twenty-seven million, one hundred sixteen thousand, nine hundred ninety-one".