27891793 has 2 divisors, whose sum is σ = 27891794. Its totient is φ = 27891792.

The previous prime is 27891763. The next prime is 27891841. The reversal of 27891793 is 39719872.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21455424 + 6436369 = 4632^2 + 2537^2 .

It is a cyclic number.

It is not a de Polignac number, because 27891793 - 2⁵ = 27891761 is a prime.

It is not a weakly prime, because it can be changed into another prime (27891733) 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, 13945896 + 13945897.

It is an arithmetic number, because the mean of its divisors is an integer number (13945897).

Almost surely, 2^27891793 is an apocalyptic number.

It is an amenable number.

27891793 is a deficient number, since it is larger than the sum of its proper divisors (1).

27891793 is an equidigital number, since it uses as much as digits as its factorization.

27891793 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 190512, while the sum is 46.

The square root of 27891793 is about 5281.2681242293. The cubic root of 27891793 is about 303.2672253258.

The spelling of 27891793 in words is "twenty-seven million, eight hundred ninety-one thousand, seven hundred ninety-three".