13928917 has 2 divisors, whose sum is σ = 13928918. Its totient is φ = 13928916.

The previous prime is 13928891. The next prime is 13928921. The reversal of 13928917 is 71982931.

13928917 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13734436 + 194481 = 3706^2 + 441^2 .

It is an emirp because it is prime and its reverse (71982931) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13928917 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13928917.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13928987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6964458 + 6964459.

It is an arithmetic number, because the mean of its divisors is an integer number (6964459).

Almost surely, 2^13928917 is an apocalyptic number.

It is an amenable number.

13928917 is a deficient number, since it is larger than the sum of its proper divisors (1).

13928917 is an equidigital number, since it uses as much as digits as its factorization.

13928917 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27216, while the sum is 40.

The square root of 13928917 is about 3732.1464333544. The cubic root of 13928917 is about 240.6056290023.

The spelling of 13928917 in words is "thirteen million, nine hundred twenty-eight thousand, nine hundred seventeen".