13680965 has 4 divisors (see below), whose sum is σ = 16417164. Its totient is φ = 10944768.

The previous prime is 13680949. The next prime is 13681033. The reversal of 13680965 is 56908631.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 56908631 = 13 ⋅4377587.

It can be written as a sum of positive squares in 2 ways, for example, as 6315169 + 7365796 = 2513^2 + 2714^2 .

It is a cyclic number.

It is not a de Polignac number, because 13680965 - 2⁴ = 13680949 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1368092 + ... + 1368101.

It is an arithmetic number, because the mean of its divisors is an integer number (4104291).

Almost surely, 2^13680965 is an apocalyptic number.

It is an amenable number.

13680965 is a deficient number, since it is larger than the sum of its proper divisors (2736199).

13680965 is an equidigital number, since it uses as much as digits as its factorization.

13680965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2736198.

The product of its (nonzero) digits is 38880, while the sum is 38.

The square root of 13680965 is about 3698.7788525404. The cubic root of 13680965 is about 239.1693797656.

The spelling of 13680965 in words is "thirteen million, six hundred eighty thousand, nine hundred sixty-five".