13657957 has 2 divisors, whose sum is σ = 13657958. Its totient is φ = 13657956.

The previous prime is 13657939. The next prime is 13657981. The reversal of 13657957 is 75975631.

13657957 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., 13645636 + 12321 = 3694^2 + 111^2 .

It is an emirp because it is prime and its reverse (75975631) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13657957 - 2⁷ = 13657829 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13657907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6828978 + 6828979.

It is an arithmetic number, because the mean of its divisors is an integer number (6828979).

Almost surely, 2^13657957 is an apocalyptic number.

It is an amenable number.

13657957 is a deficient number, since it is larger than the sum of its proper divisors (1).

13657957 is an equidigital number, since it uses as much as digits as its factorization.

13657957 is an evil number, because the sum of its binary digits is even.

The product of its digits is 198450, while the sum is 43.

The square root of 13657957 is about 3695.6673281019. The cubic root of 13657957 is about 239.0352299508.

The spelling of 13657957 in words is "thirteen million, six hundred fifty-seven thousand, nine hundred fifty-seven".