13938679 has 2 divisors, whose sum is σ = 13938680. Its totient is φ = 13938678.

The previous prime is 13938671. The next prime is 13938697. The reversal of 13938679 is 97683931.

13938679 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

Together with next prime (13938697) 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 13938679 - 2³ = 13938671 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13938671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6969339 + 6969340.

It is an arithmetic number, because the mean of its divisors is an integer number (6969340).

Almost surely, 2^13938679 is an apocalyptic number.

13938679 is a deficient number, since it is larger than the sum of its proper divisors (1).

13938679 is an equidigital number, since it uses as much as digits as its factorization.

13938679 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 244944, while the sum is 46.

The square root of 13938679 is about 3733.4540307870. The cubic root of 13938679 is about 240.6618248920.

The spelling of 13938679 in words is "thirteen million, nine hundred thirty-eight thousand, six hundred seventy-nine".