13140709 has 4 divisors (see below), whose sum is σ = 13170816. Its totient is φ = 13110604.

The previous prime is 13140697. The next prime is 13140719. The reversal of 13140709 is 90704131.

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 a de Polignac number, because none of the positive numbers 2^k-13140709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13140719) 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, 14389 + ... + 15274.

It is an arithmetic number, because the mean of its divisors is an integer number (3292704).

Almost surely, 2^13140709 is an apocalyptic number.

It is an amenable number.

13140709 is a deficient number, since it is larger than the sum of its proper divisors (30107).

13140709 is an equidigital number, since it uses as much as digits as its factorization.

13140709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30106.

The product of its (nonzero) digits is 756, while the sum is 25.

The square root of 13140709 is about 3625.0115861884. The cubic root of 13140709 is about 235.9787697554.

The spelling of 13140709 in words is "thirteen million, one hundred forty thousand, seven hundred nine".