13187009 has 4 divisors (see below), whose sum is σ = 14385840. Its totient is φ = 11988180.

The previous prime is 13186993. The next prime is 13187011. The reversal of 13187009 is 90078131.

13187009 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 a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 13187009 - 2⁴ = 13186993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13187039) 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, 599399 + ... + 599420.

It is an arithmetic number, because the mean of its divisors is an integer number (3596460).

Almost surely, 2^13187009 is an apocalyptic number.

It is an amenable number.

13187009 is a deficient number, since it is larger than the sum of its proper divisors (1198831).

13187009 is a wasteful number, since it uses less digits than its factorization.

13187009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1198830.

The product of its (nonzero) digits is 1512, while the sum is 29.

The square root of 13187009 is about 3631.3921572862. The cubic root of 13187009 is about 236.2555942425.

The spelling of 13187009 in words is "thirteen million, one hundred eighty-seven thousand, nine".