27954348209 has 2 divisors, whose sum is σ = 27954348210. Its totient is φ = 27954348208.

The previous prime is 27954348173. The next prime is 27954348251. The reversal of 27954348209 is 90284345972.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27325743025 + 628605184 = 165305^2 + 25072^2 .

It is a cyclic number.

It is not a de Polignac number, because 27954348209 - 2²⁸ = 27685912753 is a prime.

It is not a weakly prime, because it can be changed into another prime (27954348509) 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, 13977174104 + 13977174105.

It is an arithmetic number, because the mean of its divisors is an integer number (13977174105).

Almost surely, 2^27954348209 is an apocalyptic number.

It is an amenable number.

27954348209 is a deficient number, since it is larger than the sum of its proper divisors (1).

27954348209 is an equidigital number, since it uses as much as digits as its factorization.

27954348209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4354560, while the sum is 53.

The spelling of 27954348209 in words is "twenty-seven billion, nine hundred fifty-four million, three hundred forty-eight thousand, two hundred nine".