27943802893 has 2 divisors, whose sum is σ = 27943802894. Its totient is φ = 27943802892.

The previous prime is 27943802881. The next prime is 27943802897. The reversal of 27943802893 is 39820834972.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27929762884 + 14040009 = 167122^2 + 3747^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27943802893 is a prime.

It is a super-3 number, since 3×27943802893³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27943802897) 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, 13971901446 + 13971901447.

It is an arithmetic number, because the mean of its divisors is an integer number (13971901447).

Almost surely, 2^27943802893 is an apocalyptic number.

It is an amenable number.

27943802893 is a deficient number, since it is larger than the sum of its proper divisors (1).

27943802893 is an equidigital number, since it uses as much as digits as its factorization.

27943802893 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5225472, while the sum is 55.

The spelling of 27943802893 in words is "twenty-seven billion, nine hundred forty-three million, eight hundred two thousand, eight hundred ninety-three".