133681608737 has 2 divisors, whose sum is σ = 133681608738. Its totient is φ = 133681608736.

The previous prime is 133681608727. The next prime is 133681608773. The reversal of 133681608737 is 737806186331.

Together with next prime (133681608773) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 80650888081 + 53030720656 = 283991^2 + 230284^2 .

It is an emirp because it is prime and its reverse (737806186331) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 133681608737 - 2¹⁰ = 133681607713 is a prime.

It is not a weakly prime, because it can be changed into another prime (133681608707) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66840804368 + 66840804369.

It is an arithmetic number, because the mean of its divisors is an integer number (66840804369).

Almost surely, 2^133681608737 is an apocalyptic number.

It is an amenable number.

133681608737 is a deficient number, since it is larger than the sum of its proper divisors (1).

133681608737 is an equidigital number, since it uses as much as digits as its factorization.

133681608737 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3048192, while the sum is 53.

The spelling of 133681608737 in words is "one hundred thirty-three billion, six hundred eighty-one million, six hundred eight thousand, seven hundred thirty-seven".