12247519939 has 2 divisors, whose sum is σ = 12247519940. Its totient is φ = 12247519938.

The previous prime is 12247519937. The next prime is 12247519993. The reversal of 12247519939 is 93991574221.

Together with next prime (12247519993) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12247519939 - 2¹ = 12247519937 is a prime.

Together with 12247519937, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (12247519937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6123759969 + 6123759970.

It is an arithmetic number, because the mean of its divisors is an integer number (6123759970).

Almost surely, 2^12247519939 is an apocalyptic number.

12247519939 is a deficient number, since it is larger than the sum of its proper divisors (1).

12247519939 is an equidigital number, since it uses as much as digits as its factorization.

12247519939 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1224720, while the sum is 52.

The spelling of 12247519939 in words is "twelve billion, two hundred forty-seven million, five hundred nineteen thousand, nine hundred thirty-nine".