27560989 has 2 divisors, whose sum is σ = 27560990. Its totient is φ = 27560988.

The previous prime is 27560987. The next prime is 27560999. The reversal of 27560989 is 98906572.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17288964 + 10272025 = 4158^2 + 3205^2 .

It is a cyclic number.

It is not a de Polignac number, because 27560989 - 2¹ = 27560987 is a prime.

It is a super-2 number, since 2×27560989² = 1519216229316242, which contains 22 as substring.

Together with 27560987, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27560983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13780494 + 13780495.

It is an arithmetic number, because the mean of its divisors is an integer number (13780495).

Almost surely, 2^27560989 is an apocalyptic number.

It is an amenable number.

27560989 is a deficient number, since it is larger than the sum of its proper divisors (1).

27560989 is an equidigital number, since it uses as much as digits as its factorization.

27560989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 272160, while the sum is 46.

The square root of 27560989 is about 5249.8560932658. The cubic root of 27560989 is about 302.0635109033.

The spelling of 27560989 in words is "twenty-seven million, five hundred sixty thousand, nine hundred eighty-nine".