12539476447 has 2 divisors, whose sum is σ = 12539476448. Its totient is φ = 12539476446.

The previous prime is 12539476427. The next prime is 12539476459. The reversal of 12539476447 is 74467493521.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12539476447 - 2⁷ = 12539476319 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12539476394 and 12539476403.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12539476427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6269738223 + 6269738224.

It is an arithmetic number, because the mean of its divisors is an integer number (6269738224).

Almost surely, 2^12539476447 is an apocalyptic number.

12539476447 is a deficient number, since it is larger than the sum of its proper divisors (1).

12539476447 is an equidigital number, since it uses as much as digits as its factorization.

12539476447 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5080320, while the sum is 52.

The spelling of 12539476447 in words is "twelve billion, five hundred thirty-nine million, four hundred seventy-six thousand, four hundred forty-seven".