13155909 has 16 divisors (see below), whose sum is σ = 20002752. Its totient is φ = 7619328.

The previous prime is 13155907. The next prime is 13155913. The reversal of 13155909 is 90955131.

13155909 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13155909 - 2¹ = 13155907 is a prime.

It is a super-3 number, since 3×13155909³ (a number of 22 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 13155909.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13155907) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9259 + ... + 10584.

It is an arithmetic number, because the mean of its divisors is an integer number (1250172).

Almost surely, 2^13155909 is an apocalyptic number.

It is an amenable number.

13155909 is a deficient number, since it is larger than the sum of its proper divisors (6846843).

13155909 is a wasteful number, since it uses less digits than its factorization.

13155909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19876.

The product of its (nonzero) digits is 6075, while the sum is 33.

The square root of 13155909 is about 3627.1075252879. The cubic root of 13155909 is about 236.0697210934.

The spelling of 13155909 in words is "thirteen million, one hundred fifty-five thousand, nine hundred nine".