13572709 has 4 divisors (see below), whose sum is σ = 13641804. Its totient is φ = 13503616.

The previous prime is 13572703. The next prime is 13572719. The reversal of 13572709 is 90727531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 90727531 = 47 ⋅1930373.

It can be written as a sum of positive squares in 2 ways, for example, as 10692900 + 2879809 = 3270^2 + 1697^2 .

It is a cyclic number.

It is not a de Polignac number, because 13572709 - 2⁵ = 13572677 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 (13572703) by changing a digit.

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, 34252 + ... + 34645.

It is an arithmetic number, because the mean of its divisors is an integer number (3410451).

Almost surely, 2^13572709 is an apocalyptic number.

It is an amenable number.

13572709 is a deficient number, since it is larger than the sum of its proper divisors (69095).

13572709 is an equidigital number, since it uses as much as digits as its factorization.

13572709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69094.

The product of its (nonzero) digits is 13230, while the sum is 34.

The square root of 13572709 is about 3684.1157690822. The cubic root of 13572709 is about 238.5368679884.

The spelling of 13572709 in words is "thirteen million, five hundred seventy-two thousand, seven hundred nine".