12539197507 has 2 divisors, whose sum is σ = 12539197508. Its totient is φ = 12539197506.

The previous prime is 12539197487. The next prime is 12539197511. The reversal of 12539197507 is 70579193521.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12539197507 - 2¹⁹ = 12538673219 is a prime.

It is not a weakly prime, because it can be changed into another prime (12539197537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6269598753 + 6269598754.

It is an arithmetic number, because the mean of its divisors is an integer number (6269598754).

Almost surely, 2^12539197507 is an apocalyptic number.

12539197507 is a deficient number, since it is larger than the sum of its proper divisors (1).

12539197507 is an equidigital number, since it uses as much as digits as its factorization.

12539197507 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 595350, while the sum is 49.

The spelling of 12539197507 in words is "twelve billion, five hundred thirty-nine million, one hundred ninety-seven thousand, five hundred seven".