27117689 has 2 divisors, whose sum is σ = 27117690. Its totient is φ = 27117688.

The previous prime is 27117683. The next prime is 27117691. The reversal of 27117689 is 98671172.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14100025 + 13017664 = 3755^2 + 3608^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27117689 is a prime.

Together with 27117691, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (27117683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13558844 + 13558845.

It is an arithmetic number, because the mean of its divisors is an integer number (13558845).

Almost surely, 2^27117689 is an apocalyptic number.

It is an amenable number.

27117689 is a deficient number, since it is larger than the sum of its proper divisors (1).

27117689 is an equidigital number, since it uses as much as digits as its factorization.

27117689 is an evil number, because the sum of its binary digits is even.

The product of its digits is 42336, while the sum is 41.

The square root of 27117689 is about 5207.4647382388. The cubic root of 27117689 is about 300.4352533947.

The spelling of 27117689 in words is "twenty-seven million, one hundred seventeen thousand, six hundred eighty-nine".