13657705 has 4 divisors (see below), whose sum is σ = 16389252. Its totient is φ = 10926160.

The previous prime is 13657691. The next prime is 13657739. The reversal of 13657705 is 50775631.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50775631 = 191 ⋅265841.

It can be written as a sum of positive squares in 2 ways, for example, as 3904576 + 9753129 = 1976^2 + 3123^2 .

It is not a de Polignac number, because 13657705 - 2¹¹ = 13655657 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 1365766 + ... + 1365775.

It is an arithmetic number, because the mean of its divisors is an integer number (4097313).

Almost surely, 2^13657705 is an apocalyptic number.

It is an amenable number.

13657705 is a deficient number, since it is larger than the sum of its proper divisors (2731547).

13657705 is an equidigital number, since it uses as much as digits as its factorization.

13657705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2731546.

The product of its (nonzero) digits is 22050, while the sum is 34.

The square root of 13657705 is about 3695.6332339668. The cubic root of 13657705 is about 239.0337598127.

The spelling of 13657705 in words is "thirteen million, six hundred fifty-seven thousand, seven hundred five".