12587717993 has 2 divisors, whose sum is σ = 12587717994. Its totient is φ = 12587717992.

The previous prime is 12587717981. The next prime is 12587718061. The reversal of 12587717993 is 39971778521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11889067369 + 698650624 = 109037^2 + 26432^2 .

It is an emirp because it is prime and its reverse (39971778521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12587717993 - 2¹⁸ = 12587455849 is a prime.

It is not a weakly prime, because it can be changed into another prime (12587717893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6293858996 + 6293858997.

It is an arithmetic number, because the mean of its divisors is an integer number (6293858997).

Almost surely, 2^12587717993 is an apocalyptic number.

It is an amenable number.

12587717993 is a deficient number, since it is larger than the sum of its proper divisors (1).

12587717993 is an equidigital number, since it uses as much as digits as its factorization.

12587717993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6667920, while the sum is 59.

The spelling of 12587717993 in words is "twelve billion, five hundred eighty-seven million, seven hundred seventeen thousand, nine hundred ninety-three".