27964589 has 2 divisors, whose sum is σ = 27964590. Its totient is φ = 27964588.

The previous prime is 27964579. The next prime is 27964591. The reversal of 27964589 is 98546972.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23843689 + 4120900 = 4883^2 + 2030^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27964589 is a prime.

Together with 27964591, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27964579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13982294 + 13982295.

It is an arithmetic number, because the mean of its divisors is an integer number (13982295).

Almost surely, 2^27964589 is an apocalyptic number.

It is an amenable number.

27964589 is a deficient number, since it is larger than the sum of its proper divisors (1).

27964589 is an equidigital number, since it uses as much as digits as its factorization.

27964589 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1088640, while the sum is 50.

The square root of 27964589 is about 5288.1555385597. The cubic root of 27964589 is about 303.5308328856.

The spelling of 27964589 in words is "twenty-seven million, nine hundred sixty-four thousand, five hundred eighty-nine".