27973289 has 2 divisors, whose sum is σ = 27973290. Its totient is φ = 27973288.

The previous prime is 27973273. The next prime is 27973291. The reversal of 27973289 is 98237972.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17682025 + 10291264 = 4205^2 + 3208^2 .

It is a cyclic number.

It is not a de Polignac number, because 27973289 - 2⁴ = 27973273 is a prime.

Together with 27973291, 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 (27973259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13986644 + 13986645.

It is an arithmetic number, because the mean of its divisors is an integer number (13986645).

Almost surely, 2^27973289 is an apocalyptic number.

It is an amenable number.

27973289 is a deficient number, since it is larger than the sum of its proper divisors (1).

27973289 is an equidigital number, since it uses as much as digits as its factorization.

27973289 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 27973289 is about 5288.9780676422. The cubic root of 27973289 is about 303.5623065521.

The spelling of 27973289 in words is "twenty-seven million, nine hundred seventy-three thousand, two hundred eighty-nine".