12539197513 has 2 divisors, whose sum is σ = 12539197514. Its totient is φ = 12539197512.

The previous prime is 12539197511. The next prime is 12539197519. The reversal of 12539197513 is 31579193521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8751041209 + 3788156304 = 93547^2 + 61548^2 .

It is an emirp because it is prime and its reverse (31579193521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12539197513 - 2¹ = 12539197511 is a prime.

It is a super-3 number, since 3×12539197513³ (a number of 31 digits) contains 333 as substring.

Together with 12539197511, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (12539197511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6269598756 + 6269598757.

It is an arithmetic number, because the mean of its divisors is an integer number (6269598757).

Almost surely, 2^12539197513 is an apocalyptic number.

It is an amenable number.

12539197513 is a deficient number, since it is larger than the sum of its proper divisors (1).

12539197513 is an equidigital number, since it uses as much as digits as its factorization.

12539197513 is an evil number, because the sum of its binary digits is even.

The product of its digits is 255150, while the sum is 46.

The spelling of 12539197513 in words is "twelve billion, five hundred thirty-nine million, one hundred ninety-seven thousand, five hundred thirteen".