13941665 has 4 divisors (see below), whose sum is σ = 16730004. Its totient is φ = 11153328.

The previous prime is 13941647. The next prime is 13941671. The reversal of 13941665 is 56614931.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5779216 + 8162449 = 2404^2 + 2857^2 .

It is a cyclic number.

It is not a de Polignac number, because 13941665 - 2⁸ = 13941409 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 (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1394162 + ... + 1394171.

It is an arithmetic number, because the mean of its divisors is an integer number (4182501).

Almost surely, 2^13941665 is an apocalyptic number.

It is an amenable number.

13941665 is a deficient number, since it is larger than the sum of its proper divisors (2788339).

13941665 is an equidigital number, since it uses as much as digits as its factorization.

13941665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2788338.

The product of its digits is 19440, while the sum is 35.

The square root of 13941665 is about 3733.8539071581. The cubic root of 13941665 is about 240.6790088471.

The spelling of 13941665 in words is "thirteen million, nine hundred forty-one thousand, six hundred sixty-five".