13503409 has 8 divisors (see below), whose sum is σ = 13959680. Its totient is φ = 13052016.

The previous prime is 13503407. The next prime is 13503421. The reversal of 13503409 is 90430531.

13503409 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

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 13503409 - 2¹ = 13503407 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13503401) 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, 4912 + ... + 7150.

It is an arithmetic number, because the mean of its divisors is an integer number (1744960).

Almost surely, 2^13503409 is an apocalyptic number.

It is an amenable number.

13503409 is a deficient number, since it is larger than the sum of its proper divisors (456271).

13503409 is a wasteful number, since it uses less digits than its factorization.

13503409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2439.

The product of its (nonzero) digits is 1620, while the sum is 25.

The square root of 13503409 is about 3674.6984910330. The cubic root of 13503409 is about 238.1301985165.

The spelling of 13503409 in words is "thirteen million, five hundred three thousand, four hundred nine".