12139739 has 2 divisors, whose sum is σ = 12139740. Its totient is φ = 12139738.

The previous prime is 12139723. The next prime is 12139741. The reversal of 12139739 is 93793121.

It is a strong prime.

It is an emirp because it is prime and its reverse (93793121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12139739 - 2⁴ = 12139723 is a prime.

Together with 12139741, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 12139699 and 12139708.

It is not a weakly prime, because it can be changed into another prime (12139709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6069869 + 6069870.

It is an arithmetic number, because the mean of its divisors is an integer number (6069870).

Almost surely, 2^12139739 is an apocalyptic number.

12139739 is a deficient number, since it is larger than the sum of its proper divisors (1).

12139739 is an equidigital number, since it uses as much as digits as its factorization.

12139739 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10206, while the sum is 35.

The square root of 12139739 is about 3484.2128235801. The cubic root of 12139739 is about 229.8280946098.

The spelling of 12139739 in words is "twelve million, one hundred thirty-nine thousand, seven hundred thirty-nine".