12729939347 has 4 divisors (see below), whose sum is σ = 12731820120. Its totient is φ = 12728058576.

The previous prime is 12729939323. The next prime is 12729939359. The reversal of 12729939347 is 74393992721.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74393992721 = 547 ⋅136003643.

It is a cyclic number.

It is not a de Polignac number, because 12729939347 - 2⁸ = 12729939091 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12729939292 and 12729939301.

It is not an unprimeable number, because it can be changed into a prime (12729939377) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 930197 + ... + 943782.

It is an arithmetic number, because the mean of its divisors is an integer number (3182955030).

Almost surely, 2^12729939347 is an apocalyptic number.

12729939347 is a deficient number, since it is larger than the sum of its proper divisors (1880773).

12729939347 is an equidigital number, since it uses as much as digits as its factorization.

12729939347 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1880772.

The product of its digits is 5143824, while the sum is 56.

The spelling of 12729939347 in words is "twelve billion, seven hundred twenty-nine million, nine hundred thirty-nine thousand, three hundred forty-seven".