13906657 has 2 divisors, whose sum is σ = 13906658. Its totient is φ = 13906656.

The previous prime is 13906649. The next prime is 13906681. The reversal of 13906657 is 75660931.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8667136 + 5239521 = 2944^2 + 2289^2 .

It is a cyclic number.

It is not a de Polignac number, because 13906657 - 2³ = 13906649 is a prime.

It is not a weakly prime, because it can be changed into another prime (13906637) 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, 6953328 + 6953329.

It is an arithmetic number, because the mean of its divisors is an integer number (6953329).

Almost surely, 2^13906657 is an apocalyptic number.

It is an amenable number.

13906657 is a deficient number, since it is larger than the sum of its proper divisors (1).

13906657 is an equidigital number, since it uses as much as digits as its factorization.

13906657 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34020, while the sum is 37.

The square root of 13906657 is about 3729.1630428288. The cubic root of 13906657 is about 240.4773889067.

The spelling of 13906657 in words is "thirteen million, nine hundred six thousand, six hundred fifty-seven".