27964817 has 2 divisors, whose sum is σ = 27964818. Its totient is φ = 27964816.

The previous prime is 27964753. The next prime is 27964819. The reversal of 27964817 is 71846972.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19989841 + 7974976 = 4471^2 + 2824^2 .

It is a cyclic number.

It is not a de Polignac number, because 27964817 - 2⁶ = 27964753 is a prime.

Together with 27964819, 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 (27964819) 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, 13982408 + 13982409.

It is an arithmetic number, because the mean of its divisors is an integer number (13982409).

Almost surely, 2^27964817 is an apocalyptic number.

It is an amenable number.

27964817 is a deficient number, since it is larger than the sum of its proper divisors (1).

27964817 is an equidigital number, since it uses as much as digits as its factorization.

27964817 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 169344, while the sum is 44.

The square root of 27964817 is about 5288.1770961268. The cubic root of 27964817 is about 303.5316577960.

The spelling of 27964817 in words is "twenty-seven million, nine hundred sixty-four thousand, eight hundred seventeen".