13329865 has 4 divisors (see below), whose sum is σ = 15995844. Its totient is φ = 10663888.

The previous prime is 13329859. The next prime is 13329889. The reversal of 13329865 is 56892331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 56892331 = 73 ⋅779347.

It can be written as a sum of positive squares in 2 ways, for example, as 4826809 + 8503056 = 2197^2 + 2916^2 .

It is a cyclic number.

It is not a de Polignac number, because 13329865 - 2⁹ = 13329353 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, 1332982 + ... + 1332991.

It is an arithmetic number, because the mean of its divisors is an integer number (3998961).

Almost surely, 2^13329865 is an apocalyptic number.

It is an amenable number.

13329865 is a deficient number, since it is larger than the sum of its proper divisors (2665979).

13329865 is an equidigital number, since it uses as much as digits as its factorization.

13329865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2665978.

The product of its digits is 38880, while the sum is 37.

The square root of 13329865 is about 3651.0087647115. The cubic root of 13329865 is about 237.1056576969.

The spelling of 13329865 in words is "thirteen million, three hundred twenty-nine thousand, eight hundred sixty-five".