27750000079 has 2 divisors, whose sum is σ = 27750000080. Its totient is φ = 27750000078.

The previous prime is 27750000073. The next prime is 27750000097. The reversal of 27750000079 is 97000005772.

Together with next prime (27750000097) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 27750000079 - 2²¹ = 27747902927 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27750000073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13875000039 + 13875000040.

It is an arithmetic number, because the mean of its divisors is an integer number (13875000040).

Almost surely, 2^27750000079 is an apocalyptic number.

27750000079 is a deficient number, since it is larger than the sum of its proper divisors (1).

27750000079 is an equidigital number, since it uses as much as digits as its factorization.

27750000079 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30870, while the sum is 37.

The spelling of 27750000079 in words is "twenty-seven billion, seven hundred fifty million, seventy-nine", and thus it is an aban number.