12911392547 has 2 divisors, whose sum is σ = 12911392548. Its totient is φ = 12911392546.

The previous prime is 12911392519. The next prime is 12911392567. The reversal of 12911392547 is 74529311921.

It is a strong prime.

It is an emirp because it is prime and its reverse (74529311921) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12911392547 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12911392498 and 12911392507.

It is not a weakly prime, because it can be changed into another prime (12911392567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6455696273 + 6455696274.

It is an arithmetic number, because the mean of its divisors is an integer number (6455696274).

Almost surely, 2^12911392547 is an apocalyptic number.

12911392547 is a deficient number, since it is larger than the sum of its proper divisors (1).

12911392547 is an equidigital number, since it uses as much as digits as its factorization.

12911392547 is an evil number, because the sum of its binary digits is even.

The product of its digits is 136080, while the sum is 44.

The spelling of 12911392547 in words is "twelve billion, nine hundred eleven million, three hundred ninety-two thousand, five hundred forty-seven".