12987187133 has 2 divisors, whose sum is σ = 12987187134. Its totient is φ = 12987187132.

The previous prime is 12987187099. The next prime is 12987187201. The reversal of 12987187133 is 33178178921.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12949757209 + 37429924 = 113797^2 + 6118^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12987187133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12987187033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6493593566 + 6493593567.

It is an arithmetic number, because the mean of its divisors is an integer number (6493593567).

Almost surely, 2^12987187133 is an apocalyptic number.

It is an amenable number.

12987187133 is a deficient number, since it is larger than the sum of its proper divisors (1).

12987187133 is an equidigital number, since it uses as much as digits as its factorization.

12987187133 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 508032, while the sum is 50.

The spelling of 12987187133 in words is "twelve billion, nine hundred eighty-seven million, one hundred eighty-seven thousand, one hundred thirty-three".