27928517 has 2 divisors, whose sum is σ = 27928518. Its totient is φ = 27928516.

The previous prime is 27928513. The next prime is 27928529. The reversal of 27928517 is 71582972.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21215236 + 6713281 = 4606^2 + 2591^2 .

It is a cyclic number.

It is not a de Polignac number, because 27928517 - 2² = 27928513 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27928513) 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, 13964258 + 13964259.

It is an arithmetic number, because the mean of its divisors is an integer number (13964259).

Almost surely, 2^27928517 is an apocalyptic number.

It is an amenable number.

27928517 is a deficient number, since it is larger than the sum of its proper divisors (1).

27928517 is an equidigital number, since it uses as much as digits as its factorization.

27928517 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 70560, while the sum is 41.

The square root of 27928517 is about 5284.7437970066. The cubic root of 27928517 is about 303.4002668647.

The spelling of 27928517 in words is "twenty-seven million, nine hundred twenty-eight thousand, five hundred seventeen".