13648709 has 4 divisors (see below), whose sum is σ = 13658604. Its totient is φ = 13638816.

The previous prime is 13648699. The next prime is 13648717. The reversal of 13648709 is 90784631.

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 6477025 + 7171684 = 2545^2 + 2678^2 .

It is a cyclic number.

It is not a de Polignac number, because 13648709 - 2⁴ = 13648693 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13048709) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2462 + ... + 5775.

It is an arithmetic number, because the mean of its divisors is an integer number (3414651).

Almost surely, 2^13648709 is an apocalyptic number.

It is an amenable number.

13648709 is a deficient number, since it is larger than the sum of its proper divisors (9895).

13648709 is an equidigital number, since it uses as much as digits as its factorization.

13648709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9894.

The product of its (nonzero) digits is 36288, while the sum is 38.

The square root of 13648709 is about 3694.4159213602. The cubic root of 13648709 is about 238.9812663666.

The spelling of 13648709 in words is "thirteen million, six hundred forty-eight thousand, seven hundred nine".