27984792137 has 2 divisors, whose sum is σ = 27984792138. Its totient is φ = 27984792136.

The previous prime is 27984792113. The next prime is 27984792169. The reversal of 27984792137 is 73129748972.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26949818896 + 1034973241 = 164164^2 + 32171^2 .

It is a cyclic number.

It is not a de Polignac number, because 27984792137 - 2⁸ = 27984791881 is a prime.

It is not a weakly prime, because it can be changed into another prime (27984792197) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13992396068 + 13992396069.

It is an arithmetic number, because the mean of its divisors is an integer number (13992396069).

Almost surely, 2^27984792137 is an apocalyptic number.

It is an amenable number.

27984792137 is a deficient number, since it is larger than the sum of its proper divisors (1).

27984792137 is an equidigital number, since it uses as much as digits as its factorization.

27984792137 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10668672, while the sum is 59.

The spelling of 27984792137 in words is "twenty-seven billion, nine hundred eighty-four million, seven hundred ninety-two thousand, one hundred thirty-seven".