27491270393 has 2 divisors, whose sum is σ = 27491270394. Its totient is φ = 27491270392.

The previous prime is 27491270383. The next prime is 27491270407. The reversal of 27491270393 is 39307219472.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21230821264 + 6260449129 = 145708^2 + 79123^2 .

It is a cyclic number.

It is not a de Polignac number, because 27491270393 - 2³⁴ = 10311401209 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (27491270353) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13745635196 + 13745635197.

It is an arithmetic number, because the mean of its divisors is an integer number (13745635197).

Almost surely, 2^27491270393 is an apocalyptic number.

It is an amenable number.

27491270393 is a deficient number, since it is larger than the sum of its proper divisors (1).

27491270393 is an equidigital number, since it uses as much as digits as its factorization.

27491270393 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 571536, while the sum is 47.

The spelling of 27491270393 in words is "twenty-seven billion, four hundred ninety-one million, two hundred seventy thousand, three hundred ninety-three".