13917857 has 2 divisors, whose sum is σ = 13917858. Its totient is φ = 13917856.

The previous prime is 13917847. The next prime is 13917877. The reversal of 13917857 is 75871931.

13917857 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13608721 + 309136 = 3689^2 + 556^2 .

It is a cyclic number.

It is not a de Polignac number, because 13917857 - 2¹⁸ = 13655713 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (13917847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6958928 + 6958929.

It is an arithmetic number, because the mean of its divisors is an integer number (6958929).

Almost surely, 2^13917857 is an apocalyptic number.

It is an amenable number.

13917857 is a deficient number, since it is larger than the sum of its proper divisors (1).

13917857 is an equidigital number, since it uses as much as digits as its factorization.

13917857 is an evil number, because the sum of its binary digits is even.

The product of its digits is 52920, while the sum is 41.

The square root of 13917857 is about 3730.6644180360. The cubic root of 13917857 is about 240.5419293167.

The spelling of 13917857 in words is "thirteen million, nine hundred seventeen thousand, eight hundred fifty-seven".