27937289 has 2 divisors, whose sum is σ = 27937290. Its totient is φ = 27937288.

The previous prime is 27937279. The next prime is 27937291. The reversal of 27937289 is 98273972.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20097289 + 7840000 = 4483^2 + 2800^2 .

It is a cyclic number.

It is not a de Polignac number, because 27937289 - 2²⁴ = 11160073 is a prime.

Together with 27937291, 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 (27937279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13968644 + 13968645.

It is an arithmetic number, because the mean of its divisors is an integer number (13968645).

Almost surely, 2^27937289 is an apocalyptic number.

It is an amenable number.

27937289 is a deficient number, since it is larger than the sum of its proper divisors (1).

27937289 is an equidigital number, since it uses as much as digits as its factorization.

27937289 is an evil number, because the sum of its binary digits is even.

The product of its digits is 381024, while the sum is 47.

The square root of 27937289 is about 5285.5736680137. The cubic root of 27937289 is about 303.4320282904.

The spelling of 27937289 in words is "twenty-seven million, nine hundred thirty-seven thousand, two hundred eighty-nine".