27870801797 has 2 divisors, whose sum is σ = 27870801798. Its totient is φ = 27870801796.

The previous prime is 27870801769. The next prime is 27870801821. The reversal of 27870801797 is 79710807872.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18171309601 + 9699492196 = 134801^2 + 98486^2 .

It is a cyclic number.

It is not a de Polignac number, because 27870801797 - 2²⁰ = 27869753221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27870801097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13935400898 + 13935400899.

It is an arithmetic number, because the mean of its divisors is an integer number (13935400899).

Almost surely, 2^27870801797 is an apocalyptic number.

It is an amenable number.

27870801797 is a deficient number, since it is larger than the sum of its proper divisors (1).

27870801797 is an equidigital number, since it uses as much as digits as its factorization.

27870801797 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2765952, while the sum is 56.

The spelling of 27870801797 in words is "twenty-seven billion, eight hundred seventy million, eight hundred one thousand, seven hundred ninety-seven".