27932789 has 2 divisors, whose sum is σ = 27932790. Its totient is φ = 27932788.

The previous prime is 27932777. The next prime is 27932791. The reversal of 27932789 is 98723972.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27646564 + 286225 = 5258^2 + 535^2 .

It is a cyclic number.

It is not a de Polignac number, because 27932789 - 2⁸ = 27932533 is a prime.

Together with 27932791, 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 (27932719) 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, 13966394 + 13966395.

It is an arithmetic number, because the mean of its divisors is an integer number (13966395).

Almost surely, 2^27932789 is an apocalyptic number.

It is an amenable number.

27932789 is a deficient number, since it is larger than the sum of its proper divisors (1).

27932789 is an equidigital number, since it uses as much as digits as its factorization.

27932789 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 381024, while the sum is 47.

The square root of 27932789 is about 5285.1479638701. The cubic root of 27932789 is about 303.4157356400.

The spelling of 27932789 in words is "twenty-seven million, nine hundred thirty-two thousand, seven hundred eighty-nine".