13506709 has 4 divisors (see below), whose sum is σ = 13677760. Its totient is φ = 13335660.

The previous prime is 13506707. The next prime is 13506733. The reversal of 13506709 is 90760531.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 90760531 = 331 ⋅274201.

It is a cyclic number.

It is not a de Polignac number, because 13506709 - 2¹ = 13506707 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13506707) 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, 85407 + ... + 85564.

It is an arithmetic number, because the mean of its divisors is an integer number (3419440).

Almost surely, 2^13506709 is an apocalyptic number.

It is an amenable number.

13506709 is a deficient number, since it is larger than the sum of its proper divisors (171051).

13506709 is an equidigital number, since it uses as much as digits as its factorization.

13506709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171050.

The product of its (nonzero) digits is 5670, while the sum is 31.

The square root of 13506709 is about 3675.1474800340. The cubic root of 13506709 is about 238.1495952395.

The spelling of 13506709 in words is "thirteen million, five hundred six thousand, seven hundred nine".