13845509 has 8 divisors (see below), whose sum is σ = 14640000. Its totient is φ = 13057632.

The previous prime is 13845493. The next prime is 13845523. The reversal of 13845509 is 90554831.

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

It is a cyclic number.

It is not a de Polignac number, because 13845509 - 2⁴ = 13845493 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 (13845529) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3017 + ... + 6065.

It is an arithmetic number, because the mean of its divisors is an integer number (1830000).

Almost surely, 2^13845509 is an apocalyptic number.

13845509 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

13845509 is a deficient number, since it is larger than the sum of its proper divisors (794491).

13845509 is a wasteful number, since it uses less digits than its factorization.

13845509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3307.

The product of its (nonzero) digits is 21600, while the sum is 35.

The square root of 13845509 is about 3720.9553880690. The cubic root of 13845509 is about 240.1244088786.

The spelling of 13845509 in words is "thirteen million, eight hundred forty-five thousand, five hundred nine".