13996657 has 4 divisors (see below), whose sum is σ = 14004900. Its totient is φ = 13988416.

The previous prime is 13996651. The next prime is 13996669. The reversal of 13996657 is 75669931.

13996657 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 75669931 = 23 ⋅3289997.

It can be written as a sum of positive squares in 2 ways, for example, as 1948816 + 12047841 = 1396^2 + 3471^2 .

It is a cyclic number.

It is not a de Polignac number, because 13996657 - 2³ = 13996649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13996651) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 532 + ... + 5317.

It is an arithmetic number, because the mean of its divisors is an integer number (3501225).

Almost surely, 2^13996657 is an apocalyptic number.

It is an amenable number.

13996657 is a deficient number, since it is larger than the sum of its proper divisors (8243).

13996657 is an equidigital number, since it uses as much as digits as its factorization.

13996657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8242.

The product of its digits is 306180, while the sum is 46.

The square root of 13996657 is about 3741.2106329369. The cubic root of 13996657 is about 240.9950413057.

The spelling of 13996657 in words is "thirteen million, nine hundred ninety-six thousand, six hundred fifty-seven".