13509071 has 8 divisors (see below), whose sum is σ = 13716864. Its totient is φ = 13303000.

The previous prime is 13509061. The next prime is 13509077. The reversal of 13509071 is 17090531.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-13509071 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13509071.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13509077) 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 7 ways as a sum of consecutive naturals, for example, 26606 + ... + 27108.

It is an arithmetic number, because the mean of its divisors is an integer number (1714608).

Almost surely, 2^13509071 is an apocalyptic number.

13509071 is a deficient number, since it is larger than the sum of its proper divisors (207793).

13509071 is a wasteful number, since it uses less digits than its factorization.

13509071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 861.

The product of its (nonzero) digits is 945, while the sum is 26.

The square root of 13509071 is about 3675.4688136345. The cubic root of 13509071 is about 238.1634766510.

The spelling of 13509071 in words is "thirteen million, five hundred nine thousand, seventy-one".