13381609 has 4 divisors (see below), whose sum is σ = 13487104. Its totient is φ = 13276116.

The previous prime is 13381597. The next prime is 13381633. The reversal of 13381609 is 90618331.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 90618331 = 73 ⋅1241347.

It is a cyclic number.

It is not a de Polignac number, because 13381609 - 2⁷ = 13381481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13381639) 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, 52557 + ... + 52810.

It is an arithmetic number, because the mean of its divisors is an integer number (3371776).

Almost surely, 2^13381609 is an apocalyptic number.

It is an amenable number.

13381609 is a deficient number, since it is larger than the sum of its proper divisors (105495).

13381609 is a wasteful number, since it uses less digits than its factorization.

13381609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105494.

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 13381609 is about 3658.0881618682. The cubic root of 13381609 is about 237.4120612566.

The spelling of 13381609 in words is "thirteen million, three hundred eighty-one thousand, six hundred nine".