27887354773 has 2 divisors, whose sum is σ = 27887354774. Its totient is φ = 27887354772.

The previous prime is 27887354771. The next prime is 27887354777. The reversal of 27887354773 is 37745378872.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22517103249 + 5370251524 = 150057^2 + 73282^2 .

It is a cyclic number.

It is not a de Polignac number, because 27887354773 - 2¹ = 27887354771 is a prime.

Together with 27887354771, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27887354771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13943677386 + 13943677387.

It is an arithmetic number, because the mean of its divisors is an integer number (13943677387).

Almost surely, 2^27887354773 is an apocalyptic number.

It is an amenable number.

27887354773 is a deficient number, since it is larger than the sum of its proper divisors (1).

27887354773 is an equidigital number, since it uses as much as digits as its factorization.

27887354773 is an evil number, because the sum of its binary digits is even.

The product of its digits is 55319040, while the sum is 61.

The spelling of 27887354773 in words is "twenty-seven billion, eight hundred eighty-seven million, three hundred fifty-four thousand, seven hundred seventy-three".