27093875981 has 2 divisors, whose sum is σ = 27093875982. Its totient is φ = 27093875980.

The previous prime is 27093875957. The next prime is 27093875989. The reversal of 27093875981 is 18957839072.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18855409225 + 8238466756 = 137315^2 + 90766^2 .

It is a cyclic number.

It is not a de Polignac number, because 27093875981 - 2³⁴ = 9914006797 is a prime.

It is a super-2 number, since 2×27093875981² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 27093875981.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27093875989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13546937990 + 13546937991.

It is an arithmetic number, because the mean of its divisors is an integer number (13546937991).

Almost surely, 2^27093875981 is an apocalyptic number.

It is an amenable number.

27093875981 is a deficient number, since it is larger than the sum of its proper divisors (1).

27093875981 is an equidigital number, since it uses as much as digits as its factorization.

27093875981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7620480, while the sum is 59.

The spelling of 27093875981 in words is "twenty-seven billion, ninety-three million, eight hundred seventy-five thousand, nine hundred eighty-one".