13315609 has 4 divisors (see below), whose sum is σ = 13345204. Its totient is φ = 13286016.

The previous prime is 13315583. The next prime is 13315613. The reversal of 13315609 is 90651331.

13315609 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 90651331 = 1913 ⋅47387.

It can be written as a sum of positive squares in 2 ways, for example, as 11923209 + 1392400 = 3453^2 + 1180^2 .

It is a cyclic number.

It is not a de Polignac number, because 13315609 - 2¹³ = 13307417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13315619) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14112 + ... + 15025.

It is an arithmetic number, because the mean of its divisors is an integer number (3336301).

Almost surely, 2^13315609 is an apocalyptic number.

It is an amenable number.

13315609 is a deficient number, since it is larger than the sum of its proper divisors (29595).

13315609 is an equidigital number, since it uses as much as digits as its factorization.

13315609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29594.

The product of its (nonzero) digits is 2430, while the sum is 28.

The square root of 13315609 is about 3649.0559052993. The cubic root of 13315609 is about 237.0211011021.

It can be divided in two parts, 13315 and 609, that added together give a square (13924 = 118²).

The spelling of 13315609 in words is "thirteen million, three hundred fifteen thousand, six hundred nine".