27189859 has 2 divisors, whose sum is σ = 27189860. Its totient is φ = 27189858.

The previous prime is 27189853. The next prime is 27189863. The reversal of 27189859 is 95898172.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27189859 is a prime.

It is not a weakly prime, because it can be changed into another prime (27189853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13594929 + 13594930.

It is an arithmetic number, because the mean of its divisors is an integer number (13594930).

Almost surely, 2^27189859 is an apocalyptic number.

27189859 is a deficient number, since it is larger than the sum of its proper divisors (1).

27189859 is an equidigital number, since it uses as much as digits as its factorization.

27189859 is an evil number, because the sum of its binary digits is even.

The product of its digits is 362880, while the sum is 49.

The square root of 27189859 is about 5214.3896095325. The cubic root of 27189859 is about 300.7015396763.

The spelling of 27189859 in words is "twenty-seven million, one hundred eighty-nine thousand, eight hundred fifty-nine".