13579909 has 12 divisors (see below), whose sum is σ = 15890688. Its totient is φ = 11571000.

The previous prime is 13579901. The next prime is 13579921. The reversal of 13579909 is 90997531.

It is not a de Polignac number, because 13579909 - 2³ = 13579901 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 (13579901) 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 11 ways as a sum of consecutive naturals, for example, 8634 + ... + 10084.

It is an arithmetic number, because the mean of its divisors is an integer number (1324224).

Almost surely, 2^13579909 is an apocalyptic number.

It is an amenable number.

13579909 is a deficient number, since it is larger than the sum of its proper divisors (2310779).

13579909 is a wasteful number, since it uses less digits than its factorization.

13579909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1656 (or 1649 counting only the distinct ones).

The product of its (nonzero) digits is 76545, while the sum is 43.

The square root of 13579909 is about 3685.0928075152. The cubic root of 13579909 is about 238.5790399147.

Subtracting from 13579909 its sum of digits (43), we obtain a triangular number (13579866 = T₅₂₁₁).

The spelling of 13579909 in words is "thirteen million, five hundred seventy-nine thousand, nine hundred nine".