27642227 has 2 divisors, whose sum is σ = 27642228. Its totient is φ = 27642226.

The previous prime is 27642193. The next prime is 27642229. The reversal of 27642227 is 72224672.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27642227 is a prime.

Together with 27642229, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 27642193 and 27642202.

It is not a weakly prime, because it can be changed into another prime (27642229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13821113 + 13821114.

It is an arithmetic number, because the mean of its divisors is an integer number (13821114).

Almost surely, 2^27642227 is an apocalyptic number.

27642227 is a deficient number, since it is larger than the sum of its proper divisors (1).

27642227 is an equidigital number, since it uses as much as digits as its factorization.

27642227 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18816, while the sum is 32.

The square root of 27642227 is about 5257.5875646536. The cubic root of 27642227 is about 302.3600044327.

Adding to 27642227 its reverse (72224672), we get a palindrome (99866899).

The spelling of 27642227 in words is "twenty-seven million, six hundred forty-two thousand, two hundred twenty-seven".