13939157 has 2 divisors, whose sum is σ = 13939158. Its totient is φ = 13939156.

The previous prime is 13939153. The next prime is 13939183. The reversal of 13939157 is 75193931.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13256881 + 682276 = 3641^2 + 826^2 .

It is a cyclic number.

It is not a de Polignac number, because 13939157 - 2² = 13939153 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13939157.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13939153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6969578 + 6969579.

It is an arithmetic number, because the mean of its divisors is an integer number (6969579).

Almost surely, 2^13939157 is an apocalyptic number.

It is an amenable number.

13939157 is a deficient number, since it is larger than the sum of its proper divisors (1).

13939157 is an equidigital number, since it uses as much as digits as its factorization.

13939157 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25515, while the sum is 38.

The square root of 13939157 is about 3733.5180460258. The cubic root of 13939157 is about 240.6645758709.

The spelling of 13939157 in words is "thirteen million, nine hundred thirty-nine thousand, one hundred fifty-seven".