27408889 has 2 divisors, whose sum is σ = 27408890. Its totient is φ = 27408888.

The previous prime is 27408883. The next prime is 27408907. The reversal of 27408889 is 98880472.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21233664 + 6175225 = 4608^2 + 2485^2 .

It is a cyclic number.

It is not a de Polignac number, because 27408889 - 2⁷ = 27408761 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (27408883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13704444 + 13704445.

It is an arithmetic number, because the mean of its divisors is an integer number (13704445).

Almost surely, 2^27408889 is an apocalyptic number.

It is an amenable number.

27408889 is a deficient number, since it is larger than the sum of its proper divisors (1).

27408889 is an equidigital number, since it uses as much as digits as its factorization.

27408889 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 258048, while the sum is 46.

The square root of 27408889 is about 5235.3499405484. The cubic root of 27408889 is about 301.5068226507.

The spelling of 27408889 in words is "twenty-seven million, four hundred eight thousand, eight hundred eighty-nine".