13155609 has 16 divisors (see below), whose sum is σ = 18801792. Its totient is φ = 8160768.

The previous prime is 13155601. The next prime is 13155613. The reversal of 13155609 is 90655131.

13155609 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 13155609 - 2³ = 13155601 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13155601) 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, 24 + ... + 5129.

It is an arithmetic number, because the mean of its divisors is an integer number (1175112).

Almost surely, 2^13155609 is an apocalyptic number.

It is an amenable number.

13155609 is a deficient number, since it is larger than the sum of its proper divisors (5646183).

13155609 is a wasteful number, since it uses less digits than its factorization.

13155609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5216.

The product of its (nonzero) digits is 4050, while the sum is 30.

The square root of 13155609 is about 3627.0661697852. The cubic root of 13155609 is about 236.0679266791.

The spelling of 13155609 in words is "thirteen million, one hundred fifty-five thousand, six hundred nine".