13938739 has 2 divisors, whose sum is σ = 13938740. Its totient is φ = 13938738.

The previous prime is 13938731. The next prime is 13938779. The reversal of 13938739 is 93783931.

13938739 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13938739 - 2³ = 13938731 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13938695 and 13938704.

It is not a weakly prime, because it can be changed into another prime (13938731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6969369 + 6969370.

It is an arithmetic number, because the mean of its divisors is an integer number (6969370).

Almost surely, 2^13938739 is an apocalyptic number.

13938739 is a deficient number, since it is larger than the sum of its proper divisors (1).

13938739 is an equidigital number, since it uses as much as digits as its factorization.

13938739 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 122472, while the sum is 43.

The square root of 13938739 is about 3733.4620662329. The cubic root of 13938739 is about 240.6621702066.

The spelling of 13938739 in words is "thirteen million, nine hundred thirty-eight thousand, seven hundred thirty-nine".