12597849989 has 2 divisors, whose sum is σ = 12597849990. Its totient is φ = 12597849988.

The previous prime is 12597849977. The next prime is 12597850019. The reversal of 12597849989 is 98994879521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12004927489 + 592922500 = 109567^2 + 24350^2 .

It is an emirp because it is prime and its reverse (98994879521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12597849989 - 2²⁸ = 12329414533 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12597849919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6298924994 + 6298924995.

It is an arithmetic number, because the mean of its divisors is an integer number (6298924995).

Almost surely, 2^12597849989 is an apocalyptic number.

It is an amenable number.

12597849989 is a deficient number, since it is larger than the sum of its proper divisors (1).

12597849989 is an equidigital number, since it uses as much as digits as its factorization.

12597849989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 117573120, while the sum is 71.

The spelling of 12597849989 in words is "twelve billion, five hundred ninety-seven million, eight hundred forty-nine thousand, nine hundred eighty-nine".