13660849 has 4 divisors (see below), whose sum is σ = 13669236. Its totient is φ = 13652464.

The previous prime is 13660847. The next prime is 13660859. The reversal of 13660849 is 94806631.

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.

It can be written as a sum of positive squares in 2 ways, for example, as 6864400 + 6796449 = 2620^2 + 2607^2 .

It is a cyclic number.

It is not a de Polignac number, because 13660849 - 2¹ = 13660847 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13660847) 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 in 3 ways as a sum of consecutive naturals, for example, 874 + ... + 5299.

It is an arithmetic number, because the mean of its divisors is an integer number (3417309).

Almost surely, 2^13660849 is an apocalyptic number.

It is an amenable number.

13660849 is a deficient number, since it is larger than the sum of its proper divisors (8387).

13660849 is an equidigital number, since it uses as much as digits as its factorization.

13660849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8386.

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 13660849 is about 3696.0585763757. The cubic root of 13660849 is about 239.0521002411.

The spelling of 13660849 in words is "thirteen million, six hundred sixty thousand, eight hundred forty-nine".