27855427 has 2 divisors, whose sum is σ = 27855428. Its totient is φ = 27855426.

The previous prime is 27855419. The next prime is 27855431. The reversal of 27855427 is 72455872.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 27855427 - 2³ = 27855419 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 27855427.

It is not a weakly prime, because it can be changed into another prime (27855437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13927713 + 13927714.

It is an arithmetic number, because the mean of its divisors is an integer number (13927714).

Almost surely, 2^27855427 is an apocalyptic number.

27855427 is a deficient number, since it is larger than the sum of its proper divisors (1).

27855427 is an equidigital number, since it uses as much as digits as its factorization.

27855427 is an evil number, because the sum of its binary digits is even.

The product of its digits is 156800, while the sum is 40.

The square root of 27855427 is about 5277.8240781595. The cubic root of 27855427 is about 303.1353656001.

It can be divided in two parts, 27855 and 427, that added together give a palindrome (28282).

The spelling of 27855427 in words is "twenty-seven million, eight hundred fifty-five thousand, four hundred twenty-seven".