27520289 has 2 divisors, whose sum is σ = 27520290. Its totient is φ = 27520288.

The previous prime is 27520279. The next prime is 27520319. The reversal of 27520289 is 98202572.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26061025 + 1459264 = 5105^2 + 1208^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27520289 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (27520279) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13760144 + 13760145.

It is an arithmetic number, because the mean of its divisors is an integer number (13760145).

Almost surely, 2^27520289 is an apocalyptic number.

It is an amenable number.

27520289 is a deficient number, since it is larger than the sum of its proper divisors (1).

27520289 is an equidigital number, since it uses as much as digits as its factorization.

27520289 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20160, while the sum is 35.

The square root of 27520289 is about 5245.9783644236. The cubic root of 27520289 is about 301.9147494120.

The spelling of 27520289 in words is "twenty-seven million, five hundred twenty thousand, two hundred eighty-nine".