12909492139 has 2 divisors, whose sum is σ = 12909492140. Its totient is φ = 12909492138.

The previous prime is 12909492137. The next prime is 12909492151. The reversal of 12909492139 is 93129490921.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12909492139 - 2¹ = 12909492137 is a prime.

Together with 12909492137, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 12909492092 and 12909492101.

It is not a weakly prime, because it can be changed into another prime (12909492137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6454746069 + 6454746070.

It is an arithmetic number, because the mean of its divisors is an integer number (6454746070).

Almost surely, 2^12909492139 is an apocalyptic number.

12909492139 is a deficient number, since it is larger than the sum of its proper divisors (1).

12909492139 is an equidigital number, since it uses as much as digits as its factorization.

12909492139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 314928, while the sum is 49.

The spelling of 12909492139 in words is "twelve billion, nine hundred nine million, four hundred ninety-two thousand, one hundred thirty-nine".