27709042393 has 2 divisors, whose sum is σ = 27709042394. Its totient is φ = 27709042392.

The previous prime is 27709042363. The next prime is 27709042397. The reversal of 27709042393 is 39324090772.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24070901904 + 3638140489 = 155148^2 + 60317^2 .

It is a cyclic number.

It is not a de Polignac number, because 27709042393 - 2²¹ = 27706945241 is a prime.

It is not a weakly prime, because it can be changed into another prime (27709042397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13854521196 + 13854521197.

It is an arithmetic number, because the mean of its divisors is an integer number (13854521197).

Almost surely, 2^27709042393 is an apocalyptic number.

It is an amenable number.

27709042393 is a deficient number, since it is larger than the sum of its proper divisors (1).

27709042393 is an equidigital number, since it uses as much as digits as its factorization.

27709042393 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 46.

The spelling of 27709042393 in words is "twenty-seven billion, seven hundred nine million, forty-two thousand, three hundred ninety-three".