13805657 has 2 divisors, whose sum is σ = 13805658. Its totient is φ = 13805656.

The previous prime is 13805651. The next prime is 13805663. The reversal of 13805657 is 75650831.

It is a balanced prime because it is at equal distance from previous prime (13805651) and next prime (13805663).

It can be written as a sum of positive squares in only one way, i.e., 13512976 + 292681 = 3676^2 + 541^2 .

It is an emirp because it is prime and its reverse (75650831) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13805657 - 2⁴ = 13805641 is a prime.

It is not a weakly prime, because it can be changed into another prime (13805651) 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, 6902828 + 6902829.

It is an arithmetic number, because the mean of its divisors is an integer number (6902829).

Almost surely, 2^13805657 is an apocalyptic number.

It is an amenable number.

13805657 is a deficient number, since it is larger than the sum of its proper divisors (1).

13805657 is an equidigital number, since it uses as much as digits as its factorization.

13805657 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25200, while the sum is 35.

The square root of 13805657 is about 3715.5964527919. The cubic root of 13805657 is about 239.8938013943.

The spelling of 13805657 in words is "thirteen million, eight hundred five thousand, six hundred fifty-seven".