13509385 has 4 divisors (see below), whose sum is σ = 16211268. Its totient is φ = 10807504.

The previous prime is 13509367. The next prime is 13509401. The reversal of 13509385 is 58390531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 58390531 = 3461 ⋅16871.

It can be written as a sum of positive squares in 2 ways, for example, as 3674889 + 9834496 = 1917^2 + 3136^2 .

It is a cyclic number.

It is not a de Polignac number, because 13509385 - 2¹³ = 13501193 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 13509385.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1350934 + ... + 1350943.

It is an arithmetic number, because the mean of its divisors is an integer number (4052817).

Almost surely, 2^13509385 is an apocalyptic number.

It is an amenable number.

13509385 is a deficient number, since it is larger than the sum of its proper divisors (2701883).

13509385 is an equidigital number, since it uses as much as digits as its factorization.

13509385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2701882.

The product of its (nonzero) digits is 16200, while the sum is 34.

The square root of 13509385 is about 3675.5115290256. The cubic root of 13509385 is about 238.1653218988.

The spelling of 13509385 in words is "thirteen million, five hundred nine thousand, three hundred eighty-five".